All categories

3 years ago

Sphere a has a radius of 2cm. Sphere b has a radius of 4cm. Calculate the volume of sphere a.

Mathematics

1 answer:

kykrilka [37]3 years ago

6 0

Answer:

sphere a: 33.51 and sphere b: 268.08

Step-by-step explanation:

math

You might be interested in

Which line segment is a radius of circle F?<br> BE<br> AC<br> AB<br> BF

AlexFokin [52]

I think the best answer is AB

8 0

3 years ago

"A laboratory tested 73 chicken eggs and found that the mean amount of cholesterol was 230 milligrams with LaTeX: \sigmaσ = 17.4

Scrat [10]

Answer:

The 95% confidence interval for the true mean cholesterol content, μ, of all such eggs is between 226.01 and 233.99 milligrams.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.96*\frac{17.4}{\sqrt{73}} = 3.99$

The lower end of the interval is the sample mean subtracted by M. So it is 230 - 3.99 = 226.01

The upper end of the interval is the sample mean added to M. So it is 230 + 3.99 = 233.99.

The 95% confidence interval for the true mean cholesterol content, μ, of all such eggs is between 226.01 and 233.99 milligrams.

4 0

3 years ago

Working conditions in the United States in the early 1900's can best be described as?

Dmitry_Shevchenko [17]

Working conditions in the United States in the early 1900’s can best be described as atrocious.

6 0

3 years ago

Read 2 more answers

In a race in which seven automobiles are entered and there are no? ties, in how many ways can the first three finishers come? in

Alinara [238K]

This is a type of permutation problems in statistics. A permutation is a way in which the set of numbers can be arranged or order. In mathematics permutation relates to the act of ordering or arranging all the set of numbers into some sequence or order, or if the set is already in order or arranged its element the process is called permuting. Well, there are seven ways the first place can come in, then 6 ways for a second, and then 5 ways for third... so we multiply the 3 ways to get on how many different ways the first three finishers come in. 7*6*5 = 210 ways

7 0

3 years ago

Help! What does 2 divided by 9 tenths

Serga [27]

I got 0.45

Good luck!

6 0

3 years ago

Read 2 more answers