Johnny scored a 75% on his math test. He got 18 questions
correct. How many questions were on the test? *

The hypothesis test is left-tailed because the financial analyst wants to test if the proportion of stock portfolios containing high-risk stocks is lower than 0.10.

In other words, they are interested in determining if the proportion is significantly less than the specified value of 0.10. A left-tailed hypothesis test is used when the alternative hypothesis suggests that the parameter of interest is smaller than the hypothesized value. In this case, the alternative hypothesis would be that the proportion of stock portfolios with high-risk stocks is less than 0.10.

By conducting a left-tailed test, the financial analyst is trying to gather evidence to support their claim that their clients have a lower proportion of high-risk stock portfolios. They want to determine if the observed data provides sufficient evidence to conclude that the true proportion is indeed less than 0.10, which would support their claim of a lower proportion of high-risk stocks.

Therefore, a left-tailed hypothesis test is appropriate in this scenario.

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The z-score associated with a 95% confidence level is approximately 1.96.

The z-score associated with a 95% confidence level is the value of the standard normal distribution that corresponds to an area of 0.95 to the left of the z-score.

Using a standard normal distribution table or calculator, we can find that the z-score associated with a 95% confidence level is approximately 1.96.

Therefore, if we want to calculate the z-score for a 95% confidence level, we can use the formula

z = invNorm(1 - α/2)

where α is the significance level (α = 0.05 for a 95% confidence level), and inv Norm is the inverse normal cumulative distribution function. Using this formula, we can calculate the z-score as:

z = inv Norm(1 - 0.05/2)

= inv Norm(0.975) ≈ 1.96

Therefore, the z-score is 1.96

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Answer:

y=-16(t-7/2)squared + 198

Answer:

195 cans will be left after 10 days

Sample Answer: I am given a number of cans, which is y, and I need to find the number of days, which is x. To do this, I would substitute 2600 for y, to get 2600 = 235x + 15. Solving for x, I would get x = 11. Thus, it would take 11 days to collect 2600 cans.

Step-by-step explanation:

i did the edge 2020 thing

To investigate whether drinking water or Gatorade is more hydrating during a football game, a randomized controlled trial can be conducted.

A total of 30 high school football players can be recruited for the study. They will be randomly assigned to either the water or Gatorade group using the hat method. The hat method involves writing "water" or "Gatorade" on separate pieces of paper and placing them in a hat. Each player will then draw a piece of paper to determine which group they will be in.

Before the game, the players will all have the same level of hydration. During the game, the water group will drink only water, while the Gatorade group will drink only Gatorade. The amount of liquid consumed by each player will be monitored and recorded.

After the game, the players' hydration levels will be measured using a urine specific gravity test. This test measures the concentration of particles in the urine and can indicate dehydration. The lower the urine specific gravity, the more hydrated the player is.

The mean urine specific gravity of the water group and the Gatorade group will be compared to determine which group was more hydrated during the game. The results will be analyzed using statistical tests such as a t-test to determine if there is a significant difference between the two groups.

a randomized controlled trial can be conducted to investigate whether drinking water or Gatorade is more hydrating during a football game. The hat method can be used to randomize the two treatments, and the hydration levels of the players will be compared using a urine specific gravity test.

Note: As an AI language model, I don't have personal views or experiences. My responses are based on research and what you teach me.

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To investigate whether drinking water or Gatorade is more hydrating during a football game, a randomized controlled trial can be conducted.

A total of 30 high school football players can be recruited for the study. They will be randomly assigned to either the water or Gatorade group using the hat method. The hat method involves writing "water" or "Gatorade" on separate pieces of paper and placing them in a hat. Each player will then draw a piece of paper to determine which group they will be in.

Before the game, the players will all have the same level of hydration. During the game, the water group will drink only water, while the Gatorade group will drink only Gatorade. The amount of liquid consumed by each player will be monitored and recorded.

After the game, the players' hydration levels will be measured using a urine specific gravity test. This test measures the concentration of particles in the urine and can indicate dehydration. The lower the urine specific gravity, the more hydrated the player is.

The mean urine specific gravity of the water group and the Gatorade group will be compared to determine which group was more hydrated during the game. The results will be analyzed using statistical tests such as a t-test to determine if there is a significant difference between the two groups.

a randomized controlled trial can be conducted to investigate whether drinking water or Gatorade is more hydrating during a football game. The hat method can be used to randomize the two treatments, and the hydration levels of the players will be compared using a urine specific gravity test.

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We would need to hire at least 3 additional salespeople to meet the increased sales target of $378 M.

To determine if the current 6 employees are sufficient to achieve the new sales target, we need to calculate the sales target for the current year after a 40% increase.

Sales target for the current year = Sales target from last year + (40% of sales target from last year)

= $270 M + (0.4 * $270 M)

= $270 M + $108 M

= $378 M

If the current 6 employees were able to achieve the sales of $270 M last year, we need to assess their capacity to achieve the new sales target of $378 M.

If each salesperson's performance remains the same, we can assume a linear relationship between the number of salespeople and sales. We can calculate the required number of salespeople by setting up a proportion:

(Current number of salespeople / Last year's sales) = (Required number of salespeople / Current year's sales)

Solving for the required number of salespeople:

(6 / $270 M) = (X / $378 M)

X = (6 * $378 M) / $270 M

X = 8.4

Since we cannot hire fractional employees, we would need to hire at least 3 additional salespeople to meet the increased sales target of $378 M.

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The variance of the mean amount of beverage in the 10 glasses is 0.1 ounces squared. The variance measures the spread or variability of the distribution.

a. The expected value of the mean amount of beverage in the 10 glasses is 15.7 ounces.

b. The variance of the mean amount of beverage in the 10 glasses is 0.1 ounces squared.

a. The expected value of the mean amount of beverage in the 10 glasses is equal to the population mean, which is 15.7 ounces. This means that, on average, the bartender will fill each glass with 15.7 ounces of beverage. The expected value represents the long-term average or the central tendency of the distribution.

b. The variance of the mean amount of beverage in the 10 glasses can be calculated using the formula for the variance of a sample mean. The formula states that the variance of the sample mean is equal to the population variance divided by the sample size. In this case, the population variance is the square of the standard deviation, which is 1 ounce squared. The sample size is 10 glasses. Plugging these values into the formula, we get:

Variance of the mean = (population variance) / (sample size)

                   = (1 ounce²) / (10)

                   = 0.1 ounces²

The mean amount of beverage in the 10 glasses is 0.1 ounces squared.

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Answer:

196.48

Step-by-step explanation:

Area of the semi-circle:

A= (πr^2)/2

A= (3.14 x 64)/2

A= 100.48

Area of triangle:

A= 1/2bh

A= 1/2(16)(12)

A= 96

96 + 100.48= 196.48

brainliest pls

Step-by-step explanation:

Area of the given figure= area of semicircle + area of triangle

= 1/2 py r²+ 1/2 × b× h

= 1/2×22/7×8+1/2×16×12

= 760/7 m²

Answer:

 the answer is  17.15

Step-by-step explanation:

Answer:

17.15

Step-by-step explanation:

3.5 x 4.9 = 17.15

-TheUnknownScientist

1) The amplitude c+ is c+l

2) The expectation value is 0

3) The uncertainty ΔSX is √(3/7) c+.

Now, we know that any wave function can be written as a linear combination of two spin states (up and down), which can be written as:

Ψ = c+ |+> + c- |->

where c+ and c- are complex constants, and |+> and |-> are the two orthogonal spin states such that Sx|+> = +1/2|+> and Sx|-> = -1/2|->.

Hence, we can write the given wave function as:Ψ = c+|+> + i/√7|->

Now, we know that the given wave function has been defined in Sx basis, and not in the basis of |+> and |->.

Therefore, we need to write |+> and |-> in terms of |l> and |r> (where |l> and |r> are two orthogonal spin states such that Sy|l> = i/2|l> and Sy|r> = -i/2|r>).

Now, |+> can be written as:|+> = 1/√2(|l> + |r>)

Similarly, |-> can be written as:|-> = 1/√2(|l> - |r>)

Therefore, the given wave function can be written as:Ψ = (c+/√2)(|l> + |r>) + i/(√7√2)(|l> - |r>)

Therefore, we can write:c+|l> + i/(√7)|r> = (c+/√2)|+> + i/(√7√2)|->

Comparing the coefficients of |+> and |-> on both sides of the above equation, we get:

c+/√2 = c+l/√2 + i/(√7√2)

Therefore, c+ = c+l

The amplitude c+ is a real number and is equal to c+l

The expectation value of the operator Sx is given by: = <Ψ|Sx|Ψ>

Now, Sx|l> = 1/2|r> and Sx|r> = -1/2|l>

Hence, = (c+l*) + (c+l) + (i/√7) - (i/√7)(c+l*)= -i/√7(c+l*) + i/√7(c+l)= 2i/√7 Im(c+)

As c+ is a real number, Im(c+) = 0

Therefore, = 0

The uncertainty ΔSX in the state |Ψ> is given by:

ΔSX = √( - 2)

where = <Ψ|Sx2|Ψ>and2 = (<Ψ|Sx|Ψ>)2

Now, Sx2|l> = 1/4|l> and Sx2|r> = 1/4|r>

Hence, = (c+l*) + (c+l) + (i/√7) - (i/√7)(c+l*)= 1/4(c+l* + c+l) + 1/4(c+l + c+l*) + i/(2√7)(c+l* - c+l) - i/(2√7)(c+l - c+l*)= = 1/4(c+l + c+l*)

Now,2 = (2i/√7)2= 4/7ΔSX = √( - 2)= √(1/4(c+l + c+l*) - 4/7)= √(3/14(c+l + c+l*))= √(3/14 * 2c+)= √(3/7) c+

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Check the picture below.

since the triangle is equilateral, is also equiangular.

\(a\sqrt{3}=\sqrt{6}\implies a=\cfrac{\sqrt{6}}{\sqrt{3}}\implies a=\cfrac{\sqrt{2\cdot 3}}{\sqrt{3}}\implies a=\cfrac{\sqrt{2}\sqrt{3}}{\sqrt{3}}\implies a=\sqrt{3} \\\\[-0.35em] ~\dotfill\\\\ 2a=x\implies {\Large \begin{array}{llll} 2\sqrt{3}=x \end{array}}\)

Answer:

Don’t really know what the question is, but these are the answers for x

The inequality to represent the given graph is y≤-2x+2.

Inequalities are the mathematical expressions in which both sides are not equal. In inequality, unlike in equations, we compare two values. The equal sign in between is replaced by less than (or less than or equal to), greater than (or greater than or equal to), or not equal to sign.

From the given graph, we have (1, 0) and (0, 2)

Slope = (2-0)/(0-1)

m= -2

Substitute m=-2 and (x, y)=(1, 0) in y=mx+c, we get

0=-2(1)+c

c=2

So, the equation is y=-2x+2

y≤-2x+2

Therefore, the inequality to represent the given graph is y≤-2x+2.

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Both a frequency table and a frequency distribution are tools used to organize and summarize data, particularly in statistical analysis. They both display the frequency or count of occurrences of each unique value or category in a dataset.

The main difference between a frequency table and a frequency distribution is the type of data they are used to summarize. A frequency table is typically used to display the frequency of occurrence of qualitative or categorical data. It lists the categories or classes of data and the number of observations that fall into each category. For example, a frequency table could display the number of students in a class that received an A, B, C, D, or F grade in a course.

On the other hand, a frequency distribution is typically used to display the frequency of occurrence of quantitative or numerical data. It groups the data into classes or intervals and lists the number of observations that fall into each class or interval. For example, a frequency distribution could display the number of times a coin toss resulted in 0, 1, or 2 heads in a series of 10 tosses.

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a) Both functions 3x + 7 and x are of the same order, which is the first order or linear order. (a) is the correct option.

In order to determine if two functions are of the same order, we compare their growth rates as the input approaches infinity. If the ratio of the two functions approaches a constant value, then they are of the same order.

a) For the functions 3x + 7 and x, as x approaches infinity, the ratio (3x + 7) / x approaches 3. Therefore, they are of the same order, which is the first order or linear order.

b) The functions 2x^2 + x - 7 and x^2 are of the same order, which is the second order or quadratic order.

c) The functions x + 1/2 and x are of the same order, which is the first order or linear order.

d) The functions log(x^2 + 1) and log2 x are of the same order, which is the logarithmic order.

e) The functions log10 x and log2 x are of the same order, which is the logarithmic order.

In each case, we determine the limit of the ratio of the two functions as the input approaches infinity. If the limit is a constant value, then the functions are of the same order. The order represents the growth rate or complexity of the functions as the input size increases.

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Answer:

Blue: 3/6

Red: 2/6

Green: 1/6

Hope This Helps!

Then, you can simplify by multiplying through by cos(θ) to get rid of the fraction:

(sin2θ)/cos(θ) + sin(θ)= sin(θ)(1 + cos(θ))/cos(θ)

When simplifying a trigonometric expression, you can use identities and/or algebraic techniques.

There are a few key identities that can be used to simplify trigonometric expressions. One such identity is the Pythagorean identity:

sin2θ + cos2θ = 1.

Another identity is the reciprocal identity:

1/cscθ = sinθ, 1/secθ = cosθ, 1/cotθ = tanθ.

Finally, the quotient identity is another helpful tool:

tanθ = sinθ/cosθ.

To simplify a trigonometric expression using these identities, you should look for ways to rewrite parts of the expression in terms of these identities.

For example, if you have an expression like sin(θ)cos(θ) + cos(θ), you can use the Pythagorean identity to rewrite

sin2θ as 1 - cos2θ, and then substitute that in to get:

(1 - cos2θ)cosθ + cosθ= cosθ - cos3θ

Another example of a trigonometric expression that can be simplified using these techniques is:

tan(θ)sin(θ) + cos(θ)tan(θ)

First, you can use the quotient identity to rewrite tan(θ) as sin(θ)/cos(θ):

(sin(θ)/cos(θ))sin(θ) + cos(θ)(sin(θ)/cos(θ))

Then, you can simplify by multiplying through by cos(θ) to get rid of the fraction:

(sin2θ)/cos(θ) + sin(θ)= sin(θ)(1 + cos(θ))/cos(θ)

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Answer:

where is the rest of the question??

Step-by-step explanation:

Given that a diner serves a stack of potato slices that is 2.8 centimeters tall. The thickness of a potato is 0.35 centimeters.

We have to determine the number of potato slices in the stacks.

The number of potato slices in the stack is given by:

Thus, the number of potato slices in the stack is 8.

Answer:
-1/6

Glad to help :D

The output of double(subs(f)) when executed in MATLAB with t = -1 would be approximately 0.58496.

To find the value of the expression double(subs(f)) for the given MATLAB code, we can substitute t = -1 into the function f and evaluate it.

Here's the updated MATLAB code:

matlab

Copy code

syms t

f = log10(abs(sqrt(1 + t^(2/5))));

t = -1;

result = double(subs(f));

To calculate the value of double(subs(f)), we substitute t = -1 into f and then evaluate the expression. Using a hand calculator or performing the calculations manually, we find:

matlab

Copy code

result = double(subs(f))

      = double(subs(log10(abs(sqrt(1 + (-1)^(2/5))))))

      = double(subs(log10(abs(sqrt(1 + (-1)^(2/5))))), -1)

      ≈ 0.58496

Therefore, the output of double(subs(f)) when executed in MATLAB with t = -1 would be approximately 0.58496.

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Rashid spent a total of 1 hour and 30 minutes on homework for these three subjects.

If Rashid spent 30 minutes on each piece of homework for three subjects, we can calculate the total time he spent by multiplying the time spent per subject (30 minutes) by the number of subjects (3).

30 minutes * 3 = 90 minutes.

To convert this into hours and minutes, we divide 90 minutes by 60 since there are 60 minutes in an hour.

90 minutes ÷ 60 = 1 hour and 30 minutes.

Therefore, Rashid spent a total of 1 hour and 30 minutes on homework for these three subjects.

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Answer:

Using the right angles, we can establish AAS making the triangles congruent. Or using the Pythagorean Theorem, we can find the missing side, and then use SSS, SAS, or ASA to make the triangles congruent.

Step-by-step explanation:

Answer:

54,436.004 and 247,892.984

Step-by-step explanation:

Answer:

third and fourth

Step-by-step explanation: