1 pts
Question 10
Billy bought a new video game for $75. If he paid 8% sales tax, how much money will Billy pay in
total?

Answers

Answer 1

Answer:

it would be 6 dollars

Step-by-step explanation:

by multiplying 0.08 by 75 which would give you 6


Related Questions

How many solutions does the equation 6z + 1=2(3z -1) have?

Answers

Answer:

No solutions

Step-by-step explanation:

6z + 1 = 2(3z - 1)
6z + 1 = 6z - 2 (using pemdas you use the distributive property)

Next you want to combine like terms.
To get both z's on the same side you have to subtract it from one side. However, what you do to one side you must do to the other. Once you subtract 6z from both sides you are left with only numbers. Since you do not have a variable to solve for now this equation has no solutions.

Hope this helps!

The equation 6z + 1 = 2(3z - 1) has no solutions.

What is a solution?

Solutions are the values of an equation where the values are substituted in the variables of the equation and make the equality in the equation true.

We have,

6z + 1 = 2(3z - 1)

Solve for z.

6z + 1 = 2 (3z - 1)

6z + 1 = 6z - 2

1 = -2

This means,

No solutions.

Thus,

There are no solutions.

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I need the ordered pair that represents the location of B

I need the ordered pair that represents the location of B

Answers

Answer:

( 9, -35 )

Step-by-step explanation:

We can figure out how far the midpoint is from point A and just add the same values to the midpoint's coordinates to get the location of point B.

From A to Midpoint in the X direction:

+ 6

From A to Midpoint in the Y direction:

-15

The coordinate of the midpoint is:

( 3, -20)

3 + 6 = 9

-15 + (-20) = -35

The coordinates of B are:

( 9, -35 )

Write a step-by-step explanation for this two-part question:

Jack has $210 that he wants to spend on movies and games. Each movie costs $20 and each game costs $15. If Jack wants to purchase at least three games, what is the maximum number of movies he can buy (noninclusive of tax). Can he buy one more game with the change?

Answers

Answer:

8 moviesno more games

Step-by-step explanation:

You want to know the maximum number of $20 movies Jack can buy with $210 if he also buys at least three $15 games, and whether he can buy another game with the change.

Cost of 3 games

The purchase of 3 games at $15 each will take away 3×$15 = $45 from Jack's budget. This will leave him with ...

  $210 -45 = $165

Maximum movies

The amount $165 will buy ...

  $165/($20/movie) = 8.25 movies

The maximum number of movies Jack can buy is 8.

Another game?

Those 8 games will cost 8×$20 = $160, so Jack will get $5 in change.

Jack cannot buy another game with the change.

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Jack wants to exchange 250 for dollars how many more dollars how he get in the post office than in the travel agent

Travel agent 1 pound = 1. 29 dollars
Post office 1pound = 1. 34 dollars

Answers

From the units conversion, Jack will get $12.5, more dollars in case of exachanging of £250 to dollars in the post office than in the travel agent.

Unit conversion is a more than one step process that involves multiplication or division by a numerical factor and this factor is called conversion factor. It expresses the same property as a different unit of measurement. For example time can be expressed in hours, minutes or second. Jack has to different ways to exchange the £250 for dollars that is post office and travel agent. We have to determine the where he get more and how much more from other. Now, in case of post-office, unit conversion

1 pound = 1.29 dollars

So, 250 pounds( £250) = 250× 1.34 ( conversion factor)

= $335

In case of travel agent, 1 pound = 1.29 dollars

so, 250 pounds( £250) = 250× 1.29( conversion factor)

= $322.5

Therefore, he will result more dollars in exchange with post office. Now, substracts the results of both cases for determining the how much more dollars he will take from post office. That is

= $335 - $322.5

= $12.5

Hence, the required value is $12.5.

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Complete question:

Jack wants to exchange 250 for dollars how many more dollars would he get in the post office than in the travel agent

Travel agent 1 pound = 1. 29 dollars

Post office 1pound = 1. 34 dollars

Jack will receive $12.5 as a result of the units conversion, which is more money if he exchanges $250 for dollars at the post office as opposed to a travel agency.

What is unit conversion?

Unit conversion is a multi-step procedure that requires multiplying or dividing by a conversion factor, which is a numerical factor. The same attribute is expressed using a different unit of measurement. Time, for instance, can be measured in hours, minutes, or seconds. Jack has two options for converting the $250 into dollars: the post office and a travel agency. We must ascertain where and how much extra he receives from others. Now, unit conversion in the context of the post office

1 pound = 1.29 dollars

So, 250 pounds( £250) = 250× 1.34 ( conversion factor)

= $335

In case of travel agent, 1 pound = 1.29 dollars

so, 250 pounds( £250) = 250× 1.29( conversion factor)

= $322.5

He will therefore receive more money from the post office in exchange. In order to calculate how much more money he will take from the post office, he now subtracts the outcomes of both cases. Which is

= $335 - $322.5

= $12.5

Hence, the required value is $12.5.

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Complete question:

Jack wants to exchange 250 for dollars how many more dollars would he get in the post office than in the travel agent:

Travel agent 1 pound = 1. 29 dollars

Post office 1pound = 1. 34 dollars

Find the Taylor series for f(x)=e 5x
centered at a=3 using the definition of Taylor series. ∑ n=0[infinity]
​ The interval of convergence for this series is:

Answers

The Taylor series expansion for the function f(x) = e^(5x) centered at a = 3 can be found using the definition of Taylor series. The general formula for the Taylor series is:

f(x) = f(a) + f'(a)(x - a) + f''(a)(x - a)^2/2! + f'''(a)(x - a)^3/3! + ...

To find the Taylor series expansion for f(x) = e^(5x) centered at a = 3, we need to find the derivatives of f(x) and evaluate them at x = 3.

First, let's find the derivatives of f(x):

f(x) = e^(5x)

f'(x) = 5e^(5x)

f''(x) = 25e^(5x)

f'''(x) = 125e^(5x)

...

Now, let's evaluate these derivatives at x = 3:

f(3) = e^(53) = e^15

f'(3) = 5e^(53) = 5e^15

f''(3) = 25e^(53) = 25e^15

f'''(3) = 125e^(53) = 125e^15

...

The Taylor series expansion for f(x) = e^(5x) centered at a = 3 is:

f(x) = e^15 + 5e^15(x - 3) + 25e^15(x - 3)^2/2! + 125e^15(x - 3)^3/3! + ...

The interval of convergence for this series is the set of all x values for which the series converges. In this case, since e^(5x) converges for all real numbers, the interval of convergence is (-∞, ∞).

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The Taylor series for f(x) = e^(5x) centered at a = 3 is given by the sum from n = 0 to infinity of [(e^15)(x - 3)^n]/n!. The interval of convergence for this series is the set of x values for which the series converges.

To find the Taylor series for f(x) = e^(5x) centered at a = 3, we start by calculating the derivatives of f(x) at x = 3. The n-th derivative of f(x) is 5^n * e^(5x), evaluated at x = 3. The Taylor series expansion uses these derivatives and the terms (x - 3)^n/n! to approximate the function.

The resulting Taylor series is the sum from n = 0 to infinity of [(e^15)(x - 3)^n]/n!. This series converges for all values of x since e^(5x) is an entire function with no singularities or restrictions on the real number line.

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ch02 04 given wins = a0 a1 x population e1 . what is the regression term that describes a0 in the equation?

Answers

a0 is the regression term that describes the constant or intercept in the linear regression equation.

In a simple linear regression model, the equation takes the form of y = a0 + a1x + e1, where y is the dependent variable (or response variable), x is the independent variable (or predictor variable), a0 is the intercept or constant term, a1 is the coefficient of the independent variable, and e1 is the error term.

The intercept term, a0, represents the value of the dependent variable when the independent variable is zero. For example, in a linear regression model that predicts salary based on years of experience, the intercept would represent the starting salary for someone with zero years of experience. The intercept is an important component of the regression equation because it allows us to make predictions for values of x that are outside the range of our observed data.

The coefficient, a1, represents the change in the dependent variable for each one-unit increase in the independent variable. In the salary example, the coefficient would represent the average increase in salary for each additional year of experience.

Both the intercept and coefficient are estimated from the data using methods such as least squares regression. Once these values are estimated, we can use them to make predictions for new values of x.

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what does m equal please help me i give brainliest plss.

what does m equal please help me i give brainliest plss.

Answers

The answer is m≥ 1/2

Answer: m\(>=\) 1/2

Step-by-step explanation:

simplify the following ??? reply me all off you ​

simplify the following ??? reply me all off you

Answers

Answer:

29/8

You had to multiply and solve making lowest common multiple

Answer:

115/24

Step-by-step explanation:

first convert the mixed numbers to a whole fraction

then find the least common denominator which is 24

so 31 - 23 + 7 = 115/24

Kiki works in a furniture store. Her base salary is $150 per day, plus 8 percent commission on her sales. She sells several high-priced items.

A 3-column table with 3 rows. Column 1 is labeled Day with entries 1, 2, 3. Column 2 is labeled Item with entries sofa chair, loveseat, couch. Column 3 is labeled Price with entries 350 dollars, 500 dollars, 1,200 dollars.

What is the total amount she earned over these three days?

$

Answers

the answer is 614.

sorry if u didn’t get it right

Answer:614

Step-by-step explanation:did the test

Find the simple interest:
Principal: $1,750
Interest Rate: 2%
Time: 9 years

Answers

3150 don’t take my word for it

1750 x 0.2 = 350

350 x 9=3150

Jane has 3 yards of ribbon. It takes 1/4 of a yard to make a bracelet. How many bracelets can she make?

Answers

Answer:

12 bracelets

Step-by-step explanation:

HELP QUICK PLEASE!!!

What type of construction is illustrated in the figure?
A
B
t
D
С
The bisection of ZD
O The bisection of CD.
An angle congruent to ZD
O A line segment congruent to AB

HELP QUICK PLEASE!!!What type of construction is illustrated in the figure?ABtDThe bisection of ZDO The

Answers

Answer:

Solution given:

the use of compass seems that it divides the angle D in half so

o the bisection of <D.

The correct answer is A. The bisection of angle D. In the given figure, the construction is shown to bisect angle D. This means that the angle bisector divides angle D into two equal angles.

The construction of the bisector of an angle involves dividing the angle into two congruent halves. This can be done using the following steps:

Place the compass on the vertex of the angle and draw an arc that intersects both sides of the angle.

Without changing the compass width, place the compass on each of the two points where the arc intersects the sides of the angle, and draw two arcs that intersect each other.

Draw a straight line connecting the vertex of the angle to the point where the two arcs intersect. This line is called the angle bisector.

The angle bisector divides the angle into two congruent angles, with each half measuring half of the original angle.

In the given figure, the construction is shown to bisect angle D. This means that the angle bisector divides angle D into two equal angles. Therefore, the correct answer is A. The bisection of angle D.

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What is the vertex of the function x^2+x-5

Answers

Answer:

y=(x+1/2)^2-21/4

Step-by-step explanation:

See attachment for answer, which is the vertex of the function.
What is the vertex of the function x^2+x-5

To obtain certification for a certain occupation, candidates take a proficiency exam. The exam consists of two sections, and neither section should be more difficult than the other. To investigate whether one section of the exam was more difficult than the other, a random sample of 50 candidates was selected. The candidates took the exam and their scores on each section were recorded. The table shows the summary statistics

Answers

The test statistic for the appropriate test to determine if there is a significant mean difference between the percent correct on the two sections for all candidates similar to the one in the investigation is given by t = 75 - 65 / [8 / √(50)], option (A) is correct.

The appropriate test to determine if there is a significant mean difference between the percent correct on the two sections is a two-sample t-test assuming equal variances.

The test statistic for this hypothesis test can be calculated using the formula:

t = x' / (\(s{p}\) × √n')

where x' is the sample means for the first and second sections, respectively, \(s{p}\) is the pooled standard deviation, and n' is the sample sizes for the first and second sections.

Using the information given in the question, we can calculate the values needed for the test statistic:

x₁ = 75, x₂ = 65, s₁ = 10, s₂ = 5, n' = 50

x’ = x₁ - x₂ = 75 - 65 = 10

The pooled standard deviation is given by \(s_{p}\) = 8

We can calculate the test statistic:

t = (x') / [\(s_{p}\) / √(n)]

t = 75 - 65 / [8 / √(50)]

Further simplifying:

t = 10 / [8 / √(50)]

t = 8.8356

Hence, option (A) is correct.

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– The question is incomplete, The complete question is:

To obtain certification for a certain occupation, candidates take a proficiency exam. The exam consists of two sections, and neither section should be more difficult than the other. To investigate whether one section of the exam was more difficult than the other, a random sample of 50 candidates was selected. The candidates took the exam and their scores on each section were recorded.

The summary of the statistics are as follows:

-For the first section, Mean Percent Correct is 75 and Standard Deviation Percent Correct is 10

-For the second section, Mean Percent Correct is 65 and Standard Deviation Percent Correct is 5

-The difference is, Mean Percent Correct is 10, and the pooled Standard Deviation Percent Correct is 8

Which of the following is the test statistic for the appropriate test to determine if there is a significant mean difference between the percent correct on the two sections (first minus second) for all candidates similar to the one in the investigation?

A) t = 75 - 65 / (8 / √(50))

B) t = 75 - 65 / [√(10² / 50 + 5² / 50)]

C) x² =(75 - 70)² / 70 + (65-70)² / 70

D) x² = (75-70)² / 65 + (65-70)² / 65

For the linear regression y = ẞ1 + ẞ2x + e, assuming that the sum of squared errors (SSE) takes the following form:
SSE = 382 +681 +382 + 18ẞ1ẞ2
Derive the partial derivatives of SSE with respect to B1 and B2 and solve the optimal values of these parameters.
a. B₁ = B1
b. B₂ =

Answers

The optimal values of these parameters are:

a. β₁ = 0

b. β₂ = 0

The linear regression y = β1 + β2x + e, assuming that the sum of squared errors (SSE) takes the following form:

SSE = 382 + 681 + 382 + 18β1β2

Derive the partial derivatives of SSE with respect to β1 and β2 and solve the optimal values of these parameters.

Given that SSE = 382 + 681 + 382 + 18β1β2 ∂SSE/∂β1 = 0 ∂SSE/∂β2 = 0

Now, we need to find the partial derivative of SSE with respect to β1.

∂SSE/∂β1 = 0 + 0 + 0 + 18β2 ⇒ 18β2 = 0 ⇒ β2 = 0

Therefore, we obtain the optimal value of β2 as 0.

Now, we need to find the partial derivative of SSE with respect to β2. ∂SSE/∂β2 = 0 + 0 + 0 + 18β1 ⇒ 18β1 = 0 ⇒ β1 = 0

Therefore, we obtain the optimal value of β1 as 0. Hence, the partial derivative of SSE with respect to β1 is 18β2 and the partial derivative of SSE with respect to β2 is 18β1.

Thus, the optimal values of β1 and β2 are 0 and 0, respectively.

Therefore, the answers are: a. β₁ = 0 b. β₂ = 0

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Which table is a probability distribution table?

Which table is a probability distribution table?

Answers

Answer:

Step-by-step explanation:

Table 3.

a) estimate the area under the graph of f(x) = 5 cos(x) from x = 0 to x = /2 using four approximating rectangles and right endpoints. (round your answers to four decimal places.)

Answers

The estimated area under the graph of f(x) = 5 cos(x) from x = 0 to x = π/2 using four approximating rectangles and right endpoints is approximately 0.8916.

To estimate the area under the graph of f(x) = 5 cos(x) from x = 0 to x = π/2 using four approximating rectangles and right endpoints, we can use the right Riemann sum method.

The width of each rectangle, Δx, is given by the interval width divided by the number of rectangles.

In this case, Δx = (π/2 - 0)/4 = π/8.

To calculate the right endpoint values, we evaluate f(x) at the right endpoint of each rectangle.

For the first rectangle, the right endpoint is x = π/8.

For the second rectangle, the right endpoint is x = π/4.

For the third rectangle, the right endpoint is x = 3π/8.

And for the fourth rectangle, the right endpoint is x = π/2.

Now, let's calculate the area for each rectangle by multiplying the width (Δx) by the corresponding height (f(x)):

Rectangle 1: Area = f(π/8) * Δx = 5cos(π/8) * π/8

Rectangle 2: Area = f(π/4) * Δx = 5cos(π/4) * π/8

Rectangle 3: Area = f(3π/8) * Δx = 5cos(3π/8) * π/8

Rectangle 4: Area = f(π/2) * Δx = 5cos(π/2) * π/8

Now, let's calculate the values:

Rectangle 1: Area = 5cos(π/8) * π/8 ≈ 0.2887

Rectangle 2: Area = 5cos(π/4) * π/8 ≈ 0.3142

Rectangle 3: Area = 5cos(3π/8) * π/8 ≈ 0.2887

Rectangle 4: Area = 5cos(π/2) * π/8 ≈ 0

Finally, to estimate the total area, we sum up the areas of all four rectangles:

Total Area ≈ 0.2887 + 0.3142 + 0.2887 + 0 ≈ 0.8916

Therefore, the estimated area under the graph of f(x) = 5 cos(x) from x = 0 to x = π/2 using four approximating rectangles and right endpoints is approximately 0.8916.

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Given a set of 10 letters { I, D, S, A, E, T, C, G, M, W}, answer the following: len ( I, D, S, A, a) With the given letters above, we can construct a binary search tree (based on alphabetical
ordering) and the sequence < C, D, A, G, M, I, W, T, S, E is obtained by post-order traversing this tree. Construct and draw such a tree. NO steps of construction required.

Answers

The Binary Search Tree is as follows:

                                                   E

                                            /            \

                                         S                T

                                        /                    \

                                      I                       W

                                   /                            \

                                A                               M

                              /                                    \

                             C                                     G

                              \

                                D

The set of letters is {I, D, S, A, E, T, C, G, M, W} and len (I, D, S, A, a) = 5

Binary Search Tree:The binary search tree based on the alphabetical ordering of the letters is:

post-order sequence is: C, D, A, G, M, I, W, T, S, E.

To draw the binary search tree for the given post-order sequence, follow the steps below:

Start with the root node E and mark itFor the given post-order sequence C, D, A, G, M, I, W, T, S, E, identify the last element E as the root node. This node will be at the center of the drawing.Place the node containing the element S to the left of E, and mark it. Similarly, place the node containing the element T to the right of E, and mark it.Place the node containing the element I to the left of S, and mark it. Similarly, place the node containing the element W to the right of T, and mark it.Place the node containing the element A to the left of I, and mark it. Similarly, place the node containing the element M to the right of W, and mark it.Place the node containing the element C to the left of A, and mark it. Similarly, place the node containing the element G to the right of M, and mark it.Place the node containing the element D to the right of C, and mark it. Similarly, place the node containing the element E to the right of G, and mark it. This completes the construction of the binary search tree.

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Rip van Winkle fell asleep for a very long time. When he fell asleep, his beard was 888 millimeters long, and each passing week it grew 222 additional millimeters.
Graph the relationship between the length of Rip van Winkle's beard (in millimeters) and time (in weeks).

Answers

If his beard  was 8 millimeter long and each passing week it grew 2 additional millimeters, the graph that represents the relationship between the length of his beard in millimeter and time in week has been plotted

The initial length of the beard = 8 millimeter

The length of beard grow in each week = 2 millimeter

Consider the number of week as x

Therefore the linear relationship will be

The length of the beard y = 2x + 8

Plot the graph using the equation

Hence, If his beard  was 8 millimeter long and each passing week it grew 2 additional millimeters, the graph that represents the relationship between the length of his beard in millimeter and time in week has been plotted

The complete question is

Rip van Winkle fell asleep for a very long time. When he fell asleep, his beard was 8 millimeters long, and each passing week it grew 2additional millimeters.

Graph the relationship between the length of Rip van Winkle's beard (in millimeters) and time (in weeks).

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Rip van Winkle fell asleep for a very long time. When he fell asleep, his beard was 888 millimeters long,

Suppose that the duration of a particular type of criminal trial is known to have a mean of 15 days and a standard deviation of 5 days. We randomly sample 9 trials. Find the probability that the total length of the 9 trials is at least 171 days. (Round your answer to four decimal places.)

Answers

The probability that the total length of the 9 trials is at least 171 days is approximately 0.0082 (rounded to four decimal places).

To solve this problem, we can use the Central Limit Theorem (CLT) since we have a sample size of 9, which is relatively small.

Given:

Mean duration of a trial (μ) = 15 days

Standard deviation of trial duration (σ) = 5 days

Sample size (n) = 9

First, we need to find the distribution of the total length of the 9 trials. The sum of independent and identically distributed (i.i.d.) random variables follows a normal distribution when the sample size is large enough or when the population distribution is approximately normal (according to the CLT).

The mean of the total length of the 9 trials would be equal to the mean duration of a single trial multiplied by the sample size:

Mean of the total length = μ * n = 15 * 9 = 135 days

The standard deviation of the total length of the 9 trials would be the square root of the sum of the variances of the individual trials:

Standard deviation of the total length = σ * \(\sqrt{n}\) = 5 * \(\sqrt{9}\) = 5 * 3 = 15 days

Now, we want to find the probability that the total length of the 9 trials is at least 171 days. This can be converted to finding the probability that the sum is greater than or equal to 171 days.

Let X be the total length of the 9 trials. We need to calculate P(X ≥ 171).

To standardize the distribution, we can convert it to a standard normal distribution using the z-score formula:

z = (X - mean) / standard deviation

For our case:

z = (171 - 135) / 15

z = 36 / 15

z = 2.4

Using a standard normal distribution table or a calculator, we can find the probability that Z is greater than or equal to 2.4.

P(Z ≥ 2.4) ≈ 0.0082

Therefore, the probability that the total length of the 9 trials is at least 171 days is approximately 0.0082 (rounded to four decimal places).

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Question

The average of three numbers is 16. If one of the numbers is 18, what is the sum of the other two

numbers?

12

14

20

30

Answers

If the average of three numbers is 16 and one of the numbers is 18, then the sum of the other two numbers is option (d) 30

Let's use algebra to solve this problem. Let x and y be the other two numbers we are looking for. We know that the average of the three numbers is 16, so we can write:

(18 + x + y) / 3 = 16

Multiplying both sides by 3, we get,

[(18 + x + y) / 3] × 3 = 16 ×3

18 + x + y = 48

Subtracting 18 from both sides, we get,

18 + x + y - 18 = 48

x + y = 30

Therefore, the correct option is (d) 30

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I WILL GIVE YOU BRAINNIEST!!! 20POINTS!!!Employees at Youlissa's company get a 5% cost-of-living adjustment added to their salary each year. If Janice currently has a salary of $39,000, what will her salary be in 3 years?
What is the initial amount?
And
what was the rate?

Answers

Minimum salary = Current salary × (1 + Cost of living increase) = $45,000 × 1.12 ... the salary offered. By her fifth year, she will have received four annual raises.

thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 135 millimeters, and a standard deviation of 5 millimeters. if a random sample of 42 steel bolts is selected, what is the probability that the sample mean would be greater than 135.4 millimeters? round your answer to four decimal places.

Answers

The probability that the sample mean exceeds 135.4 millimeters is approximately 0.1446.  

You can use the central limit theorem to approximate the sample distribution of the sample mean.

The mean of the sample distribution is a rise to the population mean (135 mm)

 the standard deviation of the test distribution is a rise to the population standard deviation isolated by the square root of the test measure, which is \(5/√42\) ≈ 0.7689 mm.

To find the probability that the sample mean is greater than 135.4 millimeters, use the sample distribution to standardize the sample mean and use the standard normal distribution. That is,

\(z = (x - μ) / (σ / √n) = (135.4 - 135) / (5 / √42) ≒ 1.0607\)

where x = sample mean, μ = population mean, σ =population standard deviation, n=sample size, and z =standard value.

The probability that the sample mean exceeds 135.4 millimeters can be found by using a standard normal distribution table or calculator,

to find the area to the right of the Z value of 1.0607. This range is approximately 0.1446 or 14.46%.

Therefore, the probability that the sample mean exceeds 135.4 millimeters is approximately 0.1446.

learn more about the central limit theorem

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The probability that Tom wins a tennis match is 0.6. What is the probability that Tom loses a tennis match?

Answers

Answer:

0.4

Step-by-step explanation:

1-0.6=0.4???????????????

Identify and explain the processes that are used to show that a function is either a state or path function. Provide an example of each case - state or path - for each process you identify.

Answers

The processes used to determine if a function is a state or path function include integration/differentiation and examining the differential form of the function. Integrating a function with respect to a variable yields a state function, while differentiating a function with respect to a variable yields a path function.

If the differential form of a function involves only state variables, it is a state function. If it involves both state and path variables, it is a path function.

To determine whether a function is a state or path function, we can examine the properties of the function and the variables involved. A state function depends only on the current state of the system and is independent of the path taken to reach that state. In contrast, a path function depends on the path taken to reach a particular state.

One common process used to determine the nature of a function is integration or differentiation. Integrating a function with respect to a variable yields a state function, whereas differentiating a function with respect to a variable yields a path function. For example, integrating the pressure (P) with respect to volume (V) yields a state function called the internal energy (U). On the other hand, differentiating the work (W) with respect to volume (V) yields a path function known as pressure (P).

Another process used is the examination of the differential form of the function. If the differential form of a function involves only state variables, then the function is a state function. For instance, the differential form of the enthalpy (H) involves only state variables (dH = dU + PdV), making it a state function. However, if the differential form involves both state and path variables, the function is a path function. An example is the differential form of heat (Q), which involves both state and path variables (dQ = dU + PdV), indicating that it is a path function.

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A well-mixed open tank initially contains 100100 L of water with a salt concentration of 0.10.1 kg/L. Salt water enters the tank at a rate of 55 L/h with a salt concentration of 0.20.2 kg/L. An open valve allows water to leave at 44 L/h and at the same time water evaporates from the tank at 11 L/h.


Required:

a. Determine the amount and concentration of salt at any time (that is, as a function of time

b. What is the limiting concentration?

Answers

According to the question For ( a ) the amount and concentration of salt at any time \(\(t\)\) can be \(\[S(t) = 10 + 11 - 44 \times C(t) \text{ kg}\]\)\(\[C(t) = \frac{S(t)}{100}\text{ kg/L}\]\) . For ( b ) the limiting concentration of salt in the tank is 0.25 kg/L.

To determine the amount and concentration of salt at any time in the tank, we need to consider the inflow of saltwater, outflow of water, and evaporation. Let's denote the time as \(\(t\)\) in hours.

a. Amount and Concentration of Salt at any time:

Let's denote the amount of salt in the tank at time \(\(t\) as \(S(t)\)\) in kg and the concentration of salt in the tank at time \(\(t\) as \(C(t)\) in kg/L.\)

Initially, the tank contains 100 L of water with a salt concentration of 0.1 kg/L. Therefore, at \(\(t = 0\)\), we have:

\(\[S(0) = 100 \times 0.1 = 10 \text{ kg}\]\)

\(\[C(0) = 0.1 \text{ kg/L}\]\)

Considering the inflow, outflow, and evaporation rates, the amount of salt in the tank at any time \(\(t\)\) can be calculated as:

\(\[S(t) = S(0) + \text{Inflow} - \text{Outflow} - \text{Evaporation}\]\)

The inflow rate of saltwater is 55 L/h with a concentration of 0.2 kg/L. Thus, the amount of salt entering the tank per hour is:

\(\[\text{Inflow} = \text{Inflow rate} \times \text{Concentration} = 55 \times 0.2 = 11 \text{ kg/h}\]\)

The outflow rate is 44 L/h, so the amount of salt leaving the tank per hour is:

\(\[\text{Outflow} = \text{Outflow rate} \times C(t) = 44 \times C(t) \text{ kg/h}\]\)

The evaporation rate is 11 L/h, and as only water evaporates, it does not affect the salt concentration in the tank.

Therefore, the amount and concentration of salt at any time \(\(t\)\) can be expressed as follows:

\(\[S(t) = 10 + 11 - 44 \times C(t) \text{ kg}\]\)

\(\[C(t) = \frac{S(t)}{100}\text{ kg/L}\]\)

b. Limiting Concentration:

The limiting concentration refers to the concentration reached when the inflow and outflow rates balance each other, resulting in a stable concentration. In this case, the inflow rate of saltwater is 55 L/h with a concentration of 0.2 kg/L, and the outflow rate is 44 L/h. To find the limiting concentration, we equate the inflow and outflow rates:

\(\[\text{Inflow rate} \times \text{Concentration} = \text{Outflow rate} \times C_{\text{limiting}}\]\)

\(\[55 \times 0.2 = 44 \times C_{\text{limiting}}\]\)

\(\[C_{\text{limiting}} = \frac{55 \times 0.2}{44} = 0.25 \text{ kg/L}\]\)

Therefore, the limiting concentration of salt in the tank is 0.25 kg/L.

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Determine the type of correlation represented in the scatter plot below.

A. a perfect positive correlation
B. a strong positive correlation
C. a weak positive correlation
D.no correlation
E. a weak negative correlation
F. a strong negative correlation
G. a perfect negative correlation

Determine the type of correlation represented in the scatter plot below.A. a perfect positive correlation

Answers

Answer:

f is correct

Step-by-step explanation:

A weak negative correlation. Correct option is E.

What is a correlation?

A correlation between two variables tells the how the first variable will change, with change in second variable.

Given,

Value of y decreases as the value of x increases and vice versa.

Also, x and y are nearly linearly related.

But, there is still some deviation in the values and are not perfectly linear.

Hence, there is a weak negative correlation between x and y.

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A paper is in the form of a rectangle ABCD in which AB= 18 cm and BC=14cm.A semicircular portion with BC as diameter is cut off. Find the area of the remaining paper (see in below figure)

Answers

Answer:

remaining portion is area= area of rectangle- area of semicircle

= 18*14 - 3.14*7^2

=252-154.86

=199.86cm^2

What is the azimuth of an object that is ten degrees south of east?

Answers

Answer:

Step-by-step explanation:

135°

Quite commonly, azimuths or compass bearings are stated in a system in which either north or south can be the zero, and the angle may be measured clockwise or anticlockwise from the zero.

constructing an instance of an abstract class is legal, provided you do not initialize it. a. true b. false

Answers

The statement is false. It is not legal to directly instantiate an abstract class, whether or not it is initialized.

Determine the abstract class?

An abstract class is a class that cannot be instantiated directly. It serves as a blueprint for its subclasses and is meant to be extended and implemented by its derived classes. Abstract classes are designed to be partially or fully implemented by their subclasses, and they often contain abstract methods that must be overridden by the subclasses.

Attempting to instantiate an abstract class directly will result in a compilation error. The purpose of an abstract class is to provide a common interface and define common behavior for its subclasses. Therefore, it is not intended to be instantiated on its own.

To use the functionality of an abstract class, you need to create a concrete subclass that extends the abstract class and implements any necessary abstract methods. Instances of the concrete subclass can then be created and utilized.

Therefore, Incorrect. It is not permissible to directly create an instance of an abstract class, regardless of whether it is initialized or not.

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