3 years ago

A=bc Work out the value of c when a=4 b=2

Mathematics

1 answer:

astra-53 [7]3 years ago

6 0

Answer:

c=2

Step-by-step explanation:

Divide the equation with b

a/b=c

4/2=c

c is equal to 2

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Answer:

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Step-by-step explanation:

We are given the following in the question:

Proportion of US residents who thinks marijuana should be made legal = 48%

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Formula for margin of error =

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Putting values, we get,

$0.02 = 1.96\times \sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\\\\0.02 = 1.96\times \sqrt{\dfrac{0.48(1-0.48)}{n}}\\\\\sqrt{n} = 1.96\times \dfrac{\sqrt{0.48(1-0.48)}}{0.02}\\\\\sqrt{n}=48.96\\n = 2397.0816\approx 2397$

Thus, around 2397 Americans must be surveyed to get a margin of error of 2%.

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Step-by-step explanation:

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