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padilas [110]
3 years ago
11

The volume of the spheres is 500/3 pie cubic units What is the value of X?

Mathematics
2 answers:
Vlad [161]3 years ago
7 0

Answer:

x=5 assuming that x is the radius.

x is the radius?

Step-by-step explanation:

V=\frac{4}{3} \pi r^3 is the volume of a sphere.

We are given V=\frac{500}{3} \pi cubic units.

We are asked to find the value of x.  If x is not the radius, please correct me:

V=\frac{4}{3}\pi r^3 with  V=\frac{500}{3} \pi  and the assumption that x is r.

\frac{500}{3}\pi=\frac{4}{3}\pi x^3

If you multiply both sides by 3, then you would have:

500 \pi=4 \pi x^3

If you divide both sides by \pi you will have:

500=4x^3

If you divide both sides by 4, you will have:

125=x^3

The last step would be to take the cube root of both sides:

\sqrt[3]{125}=x

5=x

x=5

Julli [10]3 years ago
3 0

Answer:

125

Step-by-step explanation:

500 ÷ 4 = 125

I think this is the right answer. sorry if I'm wrong.

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Yo i need help just with the answer to rounding 418,832 to the nearest ten thousand.
faltersainse [42]

It's a question on recognizing place value.

In the figure 418,832, the digit 1 takes the place value of ten thousand (10,000).

The following number is 8, greater than 5 so it is rounded up.

Therefore, to the nearest ten thousand, we have: 420,000

4 0
1 year ago
What is the value of 5 in 42.05
Shtirlitz [24]
The 5 in 42.05 is 5 hundredths <span />
8 0
3 years ago
Lexus skateboards from his house to school 4 miles away. It takes him 20 minutes.
RoseWind [281]

Answer:

\displaystyle m = \frac{1}{5}\cdot t

Step-by-step explanation:

<u>Proportional Model</u>

The number of miles m that Lexus can skateboard in t minutes can be modeled by:

m = kt

It's given that Lexus skateboard from his house to school for a distance of m=4 miles in t=20 minutes.

Substituting:

4 = k.20

Dividing by 20

k=\frac{4}{20}

Simplifying:

k=\frac{1}{5}

This produces the model

\displaystyle m = \frac{1}{5}\cdot t

6 0
3 years ago
Read 2 more answers
A study conducted by the Center for Population Economics at the University of Chicago studied the birth weights of 623 babies bo
Margaret [11]

Answer:

The estimation for the number of newborns who weighed between 1724 grams and 5172 grams is 595.

Step-by-step explanation:

Problems of normally distributed samples are 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}

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.

In this problem, we have that:

\mu = 3448, \sigma = 862

Proportion of newborns who weighed between 1724 grams and 5172 grams.

This is the pvalue of Z when X = 5172 subtracted by the pvalue of Z when X = 1724. So

X = 5172

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

By the Central Limit Theorem

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

Z = \frac{5172 - 3448}{862}

Z = 2

Z = 2 has a pvalue of 0.9772

X = 1724

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

Z = \frac{1724 - 3448}{862}

Z = -2

Z = -2 has a pvalue of 0.0228

0.9772 - 0.0228 = 0.9544

Estimate the number of newborns who weighed between 1724 grams and 5172 grams.

0.9544 out of 623 babies. SO

0.9544*623 = 595

The estimation for the number of newborns who weighed between 1724 grams and 5172 grams is 595.

5 0
3 years ago
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lina2011 [118]

Answer: X = kuv/ (u+v)

that means that x(u+v)/(uv) = k, a constant. so you want x such that,

x(3+3)/(3*3) = 3(3+1)/(3*1)

x=6

8 0
2 years ago
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