What is the formula? I have two problems:(adsbygoogle = window.adsbygoogle || []).push({});

1. What is the volume of a sphere with a radius of 5.0 m?

My initial guess was 5^3 = 125, but apparently the answer is 523.6.

2. The radius of the earth is 6400 km. If the atmosphere is approximately 10 km high, then what is the volume of air around the earth?

Ok to be honest, I have no idea. I assume you find the volume of the earth, then the volume of a sphere with radius 10 km, and subtract the two... but that goes back to me not knowing the forumla of volume of a sphere :D

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# Volume of a sphere/circle.

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