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3 years ago

Kyle ran 8 miles. One kilometer is approximately 0.62 miles. Which measurement is closest to the number of kilometers Kyle ran?

Mathematics

2 answers:

Ne4ueva [31]3 years ago

7 0

Answer:

4.96 Kilometers

Step-by-step explanation:

galben [10]3 years ago

4 0

Answer:

12.9 kilometers

Step-by-step explanation:

Find how many kilometers Kyle ran by dividing 8 by 0.62:

8/0.62

= 12.9

So, Kyle ran approximately 12.9 kilometers

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X2 + y2 = 9<br> x + y = 2

Sergeu [11.5K]

Answer:

I think its 4,5. Not entirely sure but it makes sense

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3 years ago

What is the area of number 4?

Tanzania [10]

Answer:

Step-by-step explanation:

Look at the picture.

We have three rectangles. The formula of an area of a rectangle:

$A=lw$

l - length

w - width

Rectangle I:

$A_I=7\cdot20=140\ cm^2$

Rectangle II:

$A_{II}=6\cdot20=120\ cm^2$

Rectangle III:

$A_{III}=18\cdot30=540\ cm^2$

The area of number 4:

$A=A_{I}+A_{II}+A_{III}$

Substitute:

$A=140+120+540=800\ cm^2$

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3 years ago

Find the total amount due on a loan of $650 at the annual simple interest rate 5% at the

Deffense [45]

Answer:

$666.25

Step-by-step explanation:

Use the equation A = P(1 + rt)

P=16.25

$650+$16.25=666.25

3 0

3 years ago

A researcher wants to estimate the percentage of all adults that have used the Internet to seek pre-purchase information in the

lara31 [8.8K]

Answer:

The sample size is 1875.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

Sampling error of 0.03.

This means that $M = 0.03$

99.74% confidence level

So $\alpha = 0.0026$ , z is the value of Z that has a pvalue of $1 - \frac{0.0026}{2} = 0.9987$ , so $Z = 3$ .

25% of all adults had used the Internet for such a purpose

This means that $\pi = 0.25$

What is the sample size

The sample size is n. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 3\sqrt{\frac{0.25*0.75}{n}}$

$0.03\sqrt{n} = 3\sqrt{0.25*0.75}$

Simplifying by 0.03 both sides

$\sqrt{n} = 100\sqrt{0.25*0.75}$

$(\sqrt{n})^2 = (100\sqrt{0.25*0.75})^2$

$n = 1875$

The sample size is 1875.

7 0

3 years ago

You deposited $4500 dollars in a savings account that earns a simple interest rate. What interest rate do you need to be paid, i

irina [24]

5445 = 4500 i * 7
5445 = 31500i
i = 5445/31,500
i = 0.1729

i = 17.29%

7 0

3 years ago