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arlik [135]
2 years ago
5

Can someone help meee please

Mathematics
1 answer:
Tema [17]2 years ago
5 0
Answer is D because you multiply 135 by four since the group is made up of four
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3 years ago
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Jackson earned $57,869.00 of taxable income last year. If the federal income tax rate was 25%, then how much federal income tax
STatiana [176]

Answer:

$14,467.25     i hope this helps   :)

Step-by-step explanation:

25% of 57,869.00 = $14,467.25

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3 years ago
A study suggested that childrenbetween the ages of 6 and 11 in the US have anaverage weightof 74 lbs. with a standard deviation
Doss [256]

Answer:

The proportion of children in this age range between 70 lbs and 85 lbs is of 0.9306.

Step-by-step explanation:

When the distribution is normal, we use 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}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

A study suggested that children between the ages of 6 and 11 in the US have an average weightof 74 lbs, with a standard deviation of 2.7 lbs.

This means that \mu = 74, \sigma = 2.7

What proportion of childrenin this age range between 70 lbs and 85 lbs.

This is the pvalue of Z when X = 85 subtracted by the pvalue of Z when X = 70. So

X = 85

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

Z = \frac{85 - 74}{2.7}

Z = 4.07

Z = 4.07 has a pvalue of 1

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Z = \frac{70 - 74}{2.7}

Z = -1.48

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1 - 0.0694 = 0.9306

The proportion of children in this age range between 70 lbs and 85 lbs is of 0.9306.

7 0
2 years ago
The radius of a wheel is 21m.how much distance will it covers when it rotates 5 times?​
mrs_skeptik [129]

Answer:

Distance = 660 meters

Step-by-step explanation:

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To find the distance covered;

The distance covered in one revolution is given by the circumference of a circle.

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C = 2πr

Substituting into the formula, we have;

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C = 132 meters

Next, we find the distance covered;

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2 years ago
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