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2 years ago

Please help me I don't understand this at all

Mathematics

1 answer:

saveliy_v [14]2 years ago

6 0

Answer:

a) θ = $\frac{4}{3}\pi$ b) r = 31.27 inch

Step-by-step explanation:

(a)

area of sector: $\frac{1}{2}$ * r² * θ

384 = $\frac{1}{2}$ * r² * θ

384 = $\frac{1}{2}$ * (24)² * θ

θ = 384/288

θ = $\frac{4}{3}\pi$

(b)

384 = $\frac{1}{2}$ * r² * $\frac{\pi }{4}$

r² = 384 * 2 * $\frac{4}{\pi }$

r² = 977.848

r = √977.848

r = 31.27 inch

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The margin of error is the range of values below and above the sample statistic in a confidence interval.

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s represent the sample standard deviation

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Null hypothesis: $\mu \geq 208$

Alternative hypothesis: $\mu < 208$

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$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

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