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3 years ago

John earns $5.75 per hour. He worked 40.0 hours last week. What was the amount of his check?

Mathematics

2 answers:

ratelena [41]3 years ago

8 0

Answer: 230

Step-by-step explanation:

Given: The amount earned by John in an hour= $5.75

If he worked 40.0 hours last week, then the amount he earned is given by:-

The amount he earned in 40 hours= $40\times5.75$

⇒The amount he earned in 40 hours= $230

Hence, he earned in 40 hours = $230

Therefore, the amount of his check was 230.

Mandarinka [93]3 years ago

7 0

Answer:

230.0

This is the answer for you. Don't forget the .0 because even though there's no change, you still gotta add it like a typical cash amount.

Hope this helps~

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igor_vitrenko [27]

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Answer:

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Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

323 blacks, 86% of blacks said that they would welcome a white person into their families. This means that $n = 323, p = 0.86$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.86 - 1.96\sqrt{\frac{0.86*0.14}{323}} = 0.8222$

The upper limit of this interval is:

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3 years ago