The following information is gathered each day for 50 days at a local grocery store: • Y = SALES100 = daily sales revenue (in 100s of dollars) • TEMP = average temperature each day (in degrees) • CASHIERS = total number of cashiers working each day (in cashiers) • COUPONS = total amount of coupons redeemed each day (in dollars) • SUN = 1 if the day is Sunday and 0 otherwise (Saturday is OMITTED) • MON = 1 if the day is Monday and otherwise (Saturday is OMITTED) • TUES = 1 if the day is Tuesday and 0 otherwise (Saturday is OMITTED) • WED = 1 if the day is Wednesday and otherwise (Saturday is OMITTED) • THU = 1 if the day is Thursday and 0 otherwise (SAT IS OMITTED) • FRI = 1 if the day is Friday and 0 otherwise (SAT IS OMITTED) Ordinary least squares regression was run with the following results: Predictor Coef SE Coef T P Constant -338.41 82.58 -4.10 0.000 Temp 0.5487 0.6960 0.435 Cashiers 41.943 4.049 10.36 0.000 Coupons 0.07286 0.01687 4.32 0.000 SUN. 3.23 21.98 0.15 0.884 MON. 137.10 24.74 0.000 TUE. - 163.37 25.98 -6.29 0.000 WED. 129.46 129.02 0.523 THU. 139.15 28.79 4.83 0.000 FRI. 145.80 28.13 5.18 0.000 S = 42.3212 R-Sq = 83.9% R-Sq(adj) = 80.5% Calculate the 95% interval for the slope on "Cashiers". Round to 2 decimal places. The lower bound is ____
The upper bound is ____
Predict sales for Saturday when the average temperature is 80 degrees, 8 cashiers are working and 5250 worth of coupons are redeemed Round your final answer to the nearest whole dollar: __

Answer:

10,635.934 m^2

Step-by-step explanation:

The formula for area of a circle is π r² (pi ⋅ radius ⋅ radius)

According to the word problem, 58.2 is the radius.

Now that we know the radius, we have our final equation:

pi ⋅ radius ⋅ radius

(3.14 IS USED FOR PI)

3.14 ⋅ 58.2 ⋅ 58.2 = 10,635.9336

10,635.9336 rounded to the three decimal places (to the nearest thousandth): 10,635.934

Therefore, the area of this circle in square meters is 10,635.934 m^2.

Answer: 0.8333

Step-by-step explanation:

Answer to the 1st question: 8 years

Answer to the 2nd question: The year 2022

=======================================================

Further explanation:

x = number of years after 2008

y = average price of a new car

The prices are going up by $1250 per year on average. This is the slope because the slope is the rate of change. So m = 1250.

The y intercept is b = 30100 as this is the price in 2008.

This leads us to go from y = mx+b to y = 1250x+30100

Plug in x = 0 and you should get y = 30100.

Also, plugging x = 6 into the equation leads to y = 37600 to help confirm things.

-----------------

Next, we plug in y = 47600 and solve for x.

y = 1250x+30100

47600 = 1250x+30100

47600-30100 = 1250x

17500 = 1250x

1250x = 17500

x = 17500/1250

x = 14

This means 14 years after the year 2008 is when the average new car price will be $47,600.

2008+14 = 2022

2022-2014 = 8

Therefore, 8 years after 2014 (aka the the year 2022) is when the new car average price will be $47,600.

Answer:

a. false

b.true

c.false

d.true

e.true

Answer:

False, True, False, True True.

Step-by-step explanation:

Each of these can be checked on a scientific calculator. If you haven't got one there  are  a lot  on-line.

Part e is a bit tricky.

You do it as follows.

√(4/9) = √4 / √9 = 2/3

∛(8/27) = ∛8 / ∛27 = 2/3    So this is True.

The interval of the graph at which Susan is running fastest is from point A ( 0 , 0 ) to B ( 10 , 3 )

Given data ,

Susan is running a 5k race. The graph of distance vs. time is shown

So , the slope of the first line is m₁

And , the slope of the second line is m₂

where the points are A ( 0 , 0 ) , B ( 10 , 3 ) , C ( 20 , 4 )

Now , slope of AB is

m₁ = ( 3/10 ) = 0.3

And , m₁ = 0.3 kilometers per minute

And , slope of BC is

m₂ = ( 4 - 3 ) / ( 20 - 10 )

m₂ = 1/10

m₂ = 0.1 kilometers per minute

Therefore , the interval is fastest at second line from B ( 10 , 3 ) , C ( 20 , 4 )

Hence , Susan is running fastest is from point A ( 0 , 0 ) to B ( 10 , 3 )

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Answer:

C )   She needs to save AT LEAST  20 months

Step-by-step explanation:

Half of her income each month  is $250

m= months

250m ≥ 5000

m≥ 20

Answer:

D. between 8 and 9

Step-by-step explanation:

8*8= 64 9*9=81

80 is between 64 and 81.

Answer:

Step-by-step explanation:

Answer:

\(x=7.8\)

Step-by-step explanation:

In any right triangle, the sine of an angle is equal to its opposite side divided by the hypotenuse.

The angle marked 33 degrees has its opposite side labelled with \(x\) and the hypotenuse of the triangle labelled with 12.

Thus, we can set up the following equation to solve for \(x\):

\(\tan 33^{\circ}=\frac{x}{12},\\x=12\tan 33^{\circ}=7.79289111837\approx \boxed{7.8}\)

Answer:

Step-by-step explanation:

tan(33°) = x/12

x = 12tan(33°) ≈ 7.79

The features related to vectors are listed below:

Case A: u' = (- 4√41 / 41, - 5√41/ 41)

Case B: Tip coordinantes of vector v: (x, y) = (10, 10)

Case C: r = 11.402

In this question we must determine three features related to vectors: (a) unit vector, (b) the definition of a vector based on the coordinates of its base and its tip, (c) The magnitude of a resulting vector.

Case A - Unit vector

Unit vectors are vectors with magnitude 1, for the case of vector u we have the following definition:

u' = u / ||u||

Where:

Please notice that the magnitude of the vector is determined by Pythagorean theorem:

r = √[(Δx)² + (Δy)²]

Where:

Thus, the unit vector of u is:

u' = (- 4, - 5) / √[(- 4)² + (- 5)²]

u' = (- 4, - 5) / √41

u' = (- 4 / √41, - 5 / √41)

u' = (- 4√41 / 41, - 5√41/ 41)

Case B - Definition of a vector

This can be found easily by vector subtraction:

v = Tip coordinates - Base coordinates

(3, 4) = (x, y) - (7, 6)

(x, y) = (3, 4) + (7, 6)

(x, y) = (10, 10)

Case C - Magnitude of a vector

The magnitude is found by means of Pyhtagorean theorem:

r = √[(- 4 - 3)² + (- 5 - 4)²]

r = √[(- 7)² + (- 9)²]

r = 11.402

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Output:

2.5% 97.5%

0.9804272 1.0195226

To estimate the confidence level using R, you will need to perform a statistical test and calculate the confidence interval. Here is a step-by-step guide:

Import your data into R using the read.table or read.csv function.

Determine which statistical test is appropriate for your data. For example, if you are comparing two means, you would use a t-test.

Perform the statistical test using the appropriate function in R. For example, to perform a t-test, you would use the t.test function.

Extract the confidence interval from the results of the statistical test. The confidence interval is typically displayed as part of the output of the statistical test function.

The attached image below shows the R code that is used to form a lognormal distribution using unknown parameters.

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Answer:

The answer is A i just took the test and made a 100

Step-by-step explanation:

Answer:

w = 18

Step-by-step explanation:

Step 0: Set up the equation

=> -3w - 4 + 5w = 32

Step 1: Move the same variable together

=> -3w + 5w = 32 + 4

Step 2: Add up and simplify

=> 2w = 36

Step 3: Divide both by 2

=> w = 18

Answer:

W=18

Step-by-step explanation:

-3w-4+5w=32

-3w+5w-4=32

2w-4=32

2w=32+4

2w=36

W=18

Answer:

Corresponding sides touch the same two angle pairs.

Step-by-step explanation:

Answer:

In a pair of similar triangles, the corresponding sides are proportional. Corresponding sides touch the same two angle pairs.

When the sides are corresponding it means to go from one triangle to another you can multiply each side by the same number.

Answer:

A = (4, -2)

B = (-2, -2)

C = (-2, 2)

Please Brainliest! It wuld help out a lot..

Answer:

4 hours

Step-by-step explanation:

Danielle spent 4 hours painting. You can get this answer by subtracting how much money she spent on the pot from the total bill. This gets you 24. Then you divide this by 6, the amount of money if costs to paint an hour, which gets you 4.

Answer:

it its in a year it is 14070

Step-by-step explanation:

Reason:

We cannot divide by zero. This means the denominator cannot equal zero. If it was zero, then,

2x+10 = 0

2x = -10

x = -10/2

x = -5

Follow that chain in reverse to see that x = -5 causes the denominator 2x+10 to be zero. This is why we kick -5 out of the domain. Any other x value is valid.

Answer:

\(\displaystyle \large{(x-5)^2+(y-2)^2=25}\)

Step-by-step explanation:

Given:

First, find radius via distance between center and endpoint. The formula of distance between two points is:

\(\displaystyle \large{\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}}\)

Determine:

Hence:

\(\displaystyle \large{\sqrt{(8-5)^2+(6-2)^2}}\\\displaystyle \large{\sqrt{(3)^2+(4)^2}}\\\displaystyle \large{\sqrt{9+16} = \sqrt{25} = 5}\)

Therefore, the radius is 5.

Then we can substitute center and radius in circle equation. The equation of a circle is:

\(\displaystyle \large{(x-h)^2+(y-k)^2=r^2}\)

Our center is at (h,k) which is (5,2) and radius beings 5.

Hence, your answer is:

\(\displaystyle \large{(x-5)^2+(y-2)^2=25}\)

This is a transformation of the parent square root function, and it can be written as:

f(x) = √(-x + 4) - 2

It is ratter easy to identify the shape of the general square root function:

f(x) = √x

The only difference is that now it opens to the left, and it starts at the point (4, -2)

Then:

The sign of the x must be negative.

And with the known vertex we can write the equation:

f(x) = √(-x + 4) - 2

That is the graphed function.

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Answer: These events are independent.

Step-by-step explanation:

Two events are considered independent if the outcome of one event does not affect the outcome of the other event. In this case, getting a 5 or 6 on a dice toss and getting at most 3 on a dice toss are independent events.

This is because the probability of getting a 5 or 6 is 2/6 or 1/3, which is completely unrelated to the probability of getting at most 3, which is 3/6 or 1/2. The outcome of getting a 5 or 6 does not affect the probability of getting at most 3, and vice versa. Therefore, these events are independent.

Answer:

It's the third choice.

Step-by-step explanation:

IF y varies inversely as x then y = k/x   where k is a constant,

and k = xy    

For the 3rd choice

-1 * -2/7 = 2/7

4 * 1/14 = 2/7 and

6 * 1/21 = 2/7

so, this is inverse variation.

The measure of angle D is 45°

Similar triangles have the same corresponding angle measures and proportional side lengths. When two triangles are similar, the corresponding angles are equal.

And also the ratio of corresponding sides of similar triangles are equal.

To know the corresponding angles

side AC is corresponding to side EF, therefore angle D is congruent to angle A

angle D = 45°

OR , we can use the sum of angles In a triangle , which is 180°

angle D = 180 -( 72+63)

= 180 - 135

= 45°

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Answer:

75 cents

Step-by-step explanation:

trust me pls and id its wrong i will paypal u 75 cents

Answer:

i believe the answer would be option D

Step-by-step explanation:

Answer:

\(q=45\)

Step-by-step explanation:

Notice that \((q+2)^{\circ}\) and \((3q-2)^{\circ}\) form a linear pair, that is, they sum to \(180^{\circ}\) as follows:

\((q+2)^{\circ}+(3q-2)^{\circ}=180^{\circ}\\(q+2+3q-2)^{\circ}=180^{\circ}\\(4q)^{\circ}=180^{\circ}\\4q=180\\q=\frac{180}{4}\\q=45\)

Answer:

32

Step-by-step explanation: (40-8=32) There are 32 male's

Answer:

32

Step-by-step explanation:

8 out of 40 people is a ratio of 20 %

32 out of 40 people is a ratio of 80%

Therefore it would be 32 people are males. :D

Hope this helps

The number of times the spinner lands on a shaded section are 8 times.

What is the probability?

Probability is the branch of mathematics concerned with numerical descriptions of the likelihood of an event occurring or of a proposition being true.

We have,

2 Shaded sections are on a spinner,

8 unshaded sections are on a spinner,

10 total sections are on a spinner,

Therefore,

The probability of the spinner to land on a shaded section:

P = 2 ÷ 10 = 1 ÷ 5

consider x, the number of times the spinner lands on a shaded section.

If the spinner were spun 40 times:

so,   \(\frac{x}{40} = \frac{1}{5}\)

By cross multiplying we get,

5x = 40

x = 8

Hence, the number of times the spinner lands on a shaded section are 8 times.

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Answer:

Step-by-step explanation:

You take items out of a square root if you have a pair of numbers or if you know the square root.  

\(\sqrt{48b^{7} }\)=\(\sqrt{4*4*3*bbbbbbb}\)

So I know the \(\sqrt{4}\)=2 so i can take both out so outside the root will be 2*2 and inside the root will be 3

Now for the b's for every pair there are, you can take that out.  There are 3 pairs of b's so b³ is outside and one b is left inside.

Answer:

4b³\(\sqrt{3b}\)

To calculate the correlation coefficient between math anxiety and statistics performance, we can use the Pearson correlation coefficient formula. Therefore, the correlation coefficient between math anxiety and quiz scores is 0.474.

The formula for calculating Pearson's correlation coefficient is:

r = (NΣXY - ΣXΣY) / sqrt((NΣX^2 - (ΣX)^2) * (NΣY^2 - (ΣY)^2))

where N is the number of pairs of scores, ΣXY is the sum of the products of paired scores, ΣX is the sum of the X scores, ΣY is the sum of the Y scores, ΣX^2 is the sum of the squared X scores, and ΣY^2 is the sum of the squared Y scores.

Using the data given in the question, we can compute the correlation coefficient between math anxiety and quiz scores as follows:

N = 12

ΣX = 72

ΣY = 62

ΣXY = 464

ΣX^2 = 760

ΣY^2 = 492

Plugging these values into the formula, we get:

r = (12464 - 7262) / sqrt((12760 - 72^2) * (12492 - 62^2))

r = 0.474

Now, to interpret this result, we need to look at the magnitude and direction of the correlation coefficient. A correlation coefficient can range from -1 to 1, with a value of 0 indicating no correlation, a positive value indicating a positive correlation, and a negative value indicating a negative correlation. The magnitude of the correlation coefficient indicates the strength of the relationship, with values closer to -1 or 1 indicating a stronger relationship.

In this case, a correlation coefficient of 0.474 indicates a moderate positive correlation between math anxiety and quiz scores. This means that as math anxiety increases, quiz scores also tend to increase, but not necessarily in a linear way.

Therefore, the best conclusion given our computed result is that there is a moderate positive correlation between math anxiety and statistics performance, suggesting that students with higher levels of math anxiety may still perform well on statistics quizzes, but their performance may be slightly affected by their anxiety levels.

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