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3 years ago

The difference between two numbers is 9. The

Mathematics

1 answer:

stiks02 [169]3 years ago

6 0

Answer:

27 and 18

Step-by-step explanation:

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Customers arrive at a movie theater at the advertised movie time only to find that they have to sit through several previews and

sergij07 [2.7K]

Answer:

a) sample size is 40

Step-by-step explanation:

(a)

$\sigma=4$ minutes

Margin of error, E is 75 seconds E=75/60= 1.25 minutes.

The level of significance $\alpha= 0.05$ for 95% level of significance

For 95% confidence interval $z_{\frac{\alpha}{2}}=1.96$ from standard deviation table

Sample size required, n

$n=\left (\frac{z_{\frac{\alpha}{2}}\cdot \sigma}{E} \right )^{2}=\left (\frac{1.96\cdot4}{75/60} \right )^{2}=39.337984$

Rounding off, n=40

Sample size =40

Keywords:

95% confidence, sample size, Wall Street Journal

3 0

4 years ago

Enter the value of x.

dlinn [17]

10 is the answer because using the Pythagorean theorem 6^2 + 8^2 = 100. The square root of 100 would be 10

3 0

3 years ago

Read 2 more answers

Solve for s.<br> S+ 24 = 90

Verdich [7]

Answer:

66 = s

Step-by-step explanation:

s + 24 = 90

90 = s + 24

90 - 24 = s

66 = s

7 0

4 years ago

Read 2 more answers

A field is a rectangle with a perimeter of 1260 feet. The length is 100 feet more than width. Find the width and length of the r

lyudmila [28]

To solve this problem you must apply the proccedure shown below:

1. The formula for calculate the perimeter of a rectangle is:

$P=2L+2W$

Where $L$ is the length and $W$ is the width.

2. The length is $100ft$ more than the width, therefore:

$L=W+100$

3. Substitute values into the formula for calculate the perimeter and solve for the width:

$1260=2(W+100)+2W\\ W=265ft$

3. Then, the length is:

$L=265ft+100ft\\ L=365ft$

The answer is: The length is $365ft$ and the width is $265ft$

5 0

3 years ago

I don’t know the answer and I’m panicking help!!

Nonamiya [84]

Answer:

I think it may be the first one or the 3rd one! GOOD LUCK

7 0

3 years ago