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tensa zangetsu [6.8K]

3 years ago

14

I need some help please

2 answers:

Rudiy273 years ago

7 0

Cosine is adjacent/hypotenuse, so the answer is A: 25/24.

Remember this: SohCahToa
Soh- Sine=opposite/hypotenuse
Cah- Cosine=adjacent/hypotenuse
Toa- Tangent=opposite/adjacent
Hope that helps!

djverab [1.8K]3 years ago

7 0

The answer to your question is 24/25. Remember that Cos is taking the adjacent side and the hypotenuse of the triangle from the angle you want calculated.

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Refer to the previous exercise. The researchers wanted a sufficiently large sample to be able to estimate the probability of pre

Maru [420]

Answer:

<em>The large sample n = 117.07</em>

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given that the estimate error (M.E) = 0.08

The proportion (p) = 0.75

q =1-p = 1- 0.75 =0.25

Level of significance = 0.05

Z₀.₀₅ = 1.96≅ 2

<u><em>Step(ii):-</em></u>

The Marginal error is determined by

M.E = $\frac{Z_{0.05} \sqrt{p(1-p)} }{\sqrt{n} }$

$0.08 = \frac{2 X \sqrt{0.75(1-0.75)} }{\sqrt{n} }$

Cross multiplication , we get

$\sqrt{n} = \frac{2 X \sqrt{0.75(1-0.75)} }{0.08 }$

√n = $\frac{2 X0.4330}{0.08} = 10.825$

squaring on both sides , we get

n = 117.07

<u><em>Final answer:-</em></u>

<em>The large sample n = 117.07</em>

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Step-by-step explanation:

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combine like terms

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See picture for answer.

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4 years ago

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