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2 years ago

Simplify . (1/c + 1/h)/(1/(c ^ 2) - 1/(r ^ 2))

Mathematics

1 answer:

omeli [17]2 years ago

3 0

Answer:

(h+c)/ch ÷ (h²+c²)/c²h²

(h+c)/ch × c²h²/(h²+c²)

(h+c)/1 × ch/(h²+c²)

ch(h+c)/(h²+c²)

I would appreciate if my answer is chosen as a brainliest answer

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Answer:

The standard error of the proportion is 0.112.

Step-by-step explanation:

The standard error of a proportion is given by the following formula:

$S = \sqrt{\frac{p(1-p)}{n}}$

In which p is the probability of a success and n is the length of the sample.

In this problem

A success is a student defining themselves regular dietary supplement users. Our of 3000 students, 1500 do. So $p = \frac{1500}{3000} = 0.5$ .

We take a sample of 20 of them, so $n = 20$ .

$S = \sqrt{\frac{p(1-p)}{n}} = \sqrt{\frac{0.5*0.5}{20}} = 0.112$

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Arisa [49]

Answer:

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Step-by-step explanation:

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