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3 years ago

If y varies inversely as x and y=107y=107when x=-12x=−12, find y when x=2x=2.

Mathematics

1 answer:

Hunter-Best [27]3 years ago

7 0

107 / -12 = y / 2
y = 107 • 2 / -12
y = -107/6 =~ -17.8

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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

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Answer:

The large sample n = 117.07

Step-by-step explanation:

Step(i):-

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

Step(ii):-

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

Final answer:-

The large sample n = 117.07

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2 years ago

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lisabon 2012 [21]

In decimal form: 0.34

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3 years ago

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aalyn [17]

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Step-by-step explanation:

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