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3 years ago

Ruth's gross paycheck last week was $445.50 from working 27 hours. What is her hourly pay rate?

Mathematics

1 answer:

vaieri [72.5K]3 years ago

7 0

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<h3>= $445.5 ÷ 27Hrs</h3><h3>= 16.5</h3><h3>= <u>$16.50</u></h3><h3>Ruth's Hourly Pay Rate Is $16.50</h3>

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A series is the summation of the terms of a sequence. True False

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That's almost the exact definition word for word. (Usually they are described separately).

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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Answer:

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3 years ago

Read 2 more answers

A simple random sample of 90 analog circuits is obtained at random from an ongoing production process in which 25% of all circui

kozerog [31]

Answer:

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Step-by-step explanation:

I am going to use the binomial approximation to the normal to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

Can be approximated to a normal distribution, using the expected value and the standard deviation.

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$E(X) = np$

The standard deviation of the binomial distribution is:

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Normal probability distribution

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

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When we are approximating a binomial distribution to a normal one, we have that $\mu = E(X)$ , $\sigma = \sqrt{V(X)}$ .

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$n = 90, p = 0.25$

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