3 years ago

How many area codes (ABC) would be possible if all three digits could be any value 3-9

Mathematics

1 answer:

wolverine [178]3 years ago

4 0

Answer:

Step-by-step explanation:

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3 years ago

Points A(–3, –2) and C(4, 5) are the endpoints of a diagonal of a square. Give the coordinates of the other two vertices.

blagie [28]

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Step-by-step explanation:

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4 years ago

Suppose Riley is interested in the cost of a gallon of gas in her state. She finds the cost of a gallon of regular gas at 61 ran

hichkok12 [17]

Answer:

The standard deviation of the sample is 0.0064.

Step-by-step explanation:

The standard deviation of a sample of length n of a population with standard deviation $\sigma$ is given by the following formula:

$s = \frac{\sigma}{\sqrt{n}}$

In this problem, we have that:

61 randomly selected gas stations. This means that $n = 61$

The standard error of the mean is $0.05. This means that $\sigma = 0.05$ .

What is the standard deviation of the sample?

$s = \frac{\sigma}{\sqrt{n}} = \frac{0.05}{\sqrt{61}} = 0.0064$

The standard deviation of the sample is 0.0064.

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