$\bf \textit{volume of a sphere}\\\\ V=\cfrac{4\pi r^3}{3}~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=3\cdot 10^2 \end{cases}\implies V=\cfrac{4\pi (3\cdot 10^2)^3}{3} \implies V=\cfrac{4\pi (3^3\cdot 10^{2\cdot 3})}{3} \\\\\\ V=4\pi (3^3\cdot 10^6)3^{-1}\implies V=4\pi 3^33^{-1}\cdot 10^6\implies V=4\pi 3^{3-1}10^6 \\\\\\ V=4\cdot \pi \cdot 3^2\cdot 10^6$

6 0

3 years ago

1584 feet in 3 min 1 mile in

kvv77 [185]

1 mile is 5280ft so divide 1584 and 5280. you would get 3 infinite so the answer is 9minutes and 20 seconds

3 0

3 years ago

Billy is 6 years younger than Amy. The sum of their ages is 22. How old will each of them be in 8 years?

Dafna11 [192]

First let's find their current ages:
Billy + 6years = Amy
Billy + Amy = 22

Combining these equations:
Billy + (Billy + 6years) = 22
2 Billy = 16
Billy = 8

Billy + 6 = Amy
8 + 6 = Amy
Amy = 14

In 8 years Billy will be 16 and Amy will be 22. The answer is d.

3 0

3 years ago

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This is my last problem and I don't know whether or not this is right. Can someone please help me? <3 <3 <3 (7th grade

uysha [10]

You got the total number of pages correct, but the equation gets you 39 total pages. Instead of multiplying by 1/3, you multiply by 3 because 114+3 is 1/3 of the total pages. So:

(114+3) · 3 = p

351 = p

6 0

3 years ago

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