Asked by A 9th grader

Okay, if the circumference of a sphere is
3.9 x 10^4 (scientific notation), then what is it's radius? And what is it's volume?

I know how to do the calculations, but the answers I get don't seem to make sense!
Answered by bobpursley
radius=cir/2PI=3.9E4/2PI=6.2E3

Right?
Answered by A 9th grader
YESSS that's what I got for radius! Thank you so much, I thought I was going crazy cause my lab partner had a diff result but wouldn't relent.

Now, what about volume?
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