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Shalnov [3]
3 years ago
15

Explain how to calculate the volume of a sphere.

Mathematics
1 answer:
likoan [24]3 years ago
5 0

Answer:

V = ⁴⁄₃πr³. In this equation, "V" represents volume and "r" represents the radius of the sphere.

Step-by-step explanation:

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Perform the indicated operation.
Verizon [17]

Answer:

The answer is B. 298? im not sure if it was supposed to be ≈ or not

6 0
3 years ago
What percent of the dogs and cats sold were dogs? a 70% b 22% c 55% d 45%
denis23 [38]
This gives no information, how many of each were sold
8 0
2 years ago
Read 2 more answers
g Annual starting salaries in a certain region of the U. S. for college graduates with an engineering major are normally distrib
algol13

Answer:

The probability that the sample mean would be at least $39000 is of 0.8665 = 86.65%.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Mean $39725 and standard deviation $7320.

This means that \mu = 39725, \sigma = 7320

Sample of 125

This means that n = 125, s = \frac{7320}{\sqrt{125}}

The probability that the sample mean would be at least $39000 is about?

This is 1 subtracted by the pvalue of Z when X = 39000. So

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

By the Central Limit Theorem

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

Z = \frac{39000 - 39725}{\frac{7320}{\sqrt{125}}}

Z = -1.11

Z = -1.11 has a pvalue of 0.1335

1 - 0.1335 = 0.8665

The probability that the sample mean would be at least $39000 is of 0.8665 = 86.65%.

4 0
2 years ago
What is the the mode of April's temperatures?<br> A<br> B<br> C<br> D
ankoles [38]

Answer:

B: no mode

Explanation:

A mode is a number that occurs often in a set of data. Since all of April's temperatures are different, there is no mode.

8 0
3 years ago
Read 2 more answers
F(x) = 3x2²2 = 13
snow_lady [41]

Answer: 5/13

Step-by-step explanation:

f(2)=\frac{3(2)^{2}-7}{4(2)^{2}-3}=\boxed{\frac{5}{13}}

8 0
2 years ago
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