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3 years ago

2) Use the rules of exponents to evaluate or simplify. Write without negative exponents. 1 / 4^-2 = ____

Mathematics

2 answers:

vazorg [7]3 years ago

7 0

Answer:

Step-by-step explanation:

1/4^-2

Express with a positive exponent

4^2

Evaluate the power

<h2>Solution: <u>16</u></h2><h2>∵</h2>

lions [1.4K]3 years ago

5 0

$\frac{1}{4^{-2}}=\frac{1}{\left(\frac{1}{4}\right)^2}=\frac{1}{\frac{1}{4^2}}=4^2=16$

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Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.47 and a standard deviation of 1.5. U

alex41 [277]

Answer:

2.5% of American women have shoe sizes that are greater than 11.47.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 8.47

Standard deviation = 1.5

The normal distribution is symmetric, which means that half the measures are below the mean, and half are above the mean.

What percentage of American women have shoe sizes that are greater than 11.47?

11.47 = 8.47 + 2*1.5

This means that 11.47 is two standard deviations above the mean.

Of those measures below the mean, none are greater than 11.47.

Of those measures above the mean, 95% are between the mean and 11.47, and 5% are above. So

0.5*0.05 = 0.025

2.5% of American women have shoe sizes that are greater than 11.47.

8 0

3 years ago

Find the area of the circle to the nearest tenth. use 3.14 for pie

VikaD [51]

I assume that 4.4 is the diameter,please do correct me if i am wrong.

To get the area of the circle,the formula is 丌r^2

to find the radius,we need ro devide the diameter by 2

thus the equations is
$3.14 \times ({4.4 \div 2})^{2} \\ = 3.14 \times {2.2}^{2} \\ = 15.196 \\ = 15.2(correct \: to \: the \: nearest \: tenth)$
Therefore the answer is B.15.2

hope it helps!

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3 years ago

Read 2 more answers

In a (blank) , one ratio compares a part to a whole

Archy [21]

While it does sounds redundant, it could be a "part to whole" ratio

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3 years ago

46 meters use pie= 3.14

Ugo [173]

Could you explain what you need help with for this question more? i can help i just need an explanation of what you need:)

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