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Zarrin [17]
3 years ago
15

Help me like right know

Mathematics
2 answers:
Ray Of Light [21]3 years ago
3 0

Answer:

B. 530.66 in.

Step-by-step explanation:

The formula to find circumference is \pi r^{2}. The radius here is 13. 13 squared is 169. 169 x 3.14 is 530.66.

Hope it helps!

BartSMP [9]3 years ago
3 0

Answer:

The circumference is approximately 81.68

Step-by-step explanation:

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kirza4 [7]

Answer:

-22

Step-by-step explanation:

Which part of the function is valid when x = -6

The first part

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A researcher surveyed 220 residents of a city about the number of hours they
olga55 [171]

Answer:

Margin of error of 0.0485 hours.

Step-by-step explanation:

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Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

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Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

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In this question:

\sigma = 0.35, n = 220

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M = z\frac{\sigma}{\sqrt{n}}

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Answer is A

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3 years ago
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