SOLUTION: dan needs his spherical balloon to have a circumference to 16 pi inches. how much helium will he use? use 3.14 for pi.

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Question 878187: dan needs his spherical balloon to have a circumference to 16 pi inches. how much helium will he use? use 3.14 for pi.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
One would guess you want the volume of the balloon which has circumference 16 pi. units of cubic inches for the volume.

2pi%2Ar=16 and v=%284%2F3%29pi%2Ar%5E3;
You want to solve for v.

From circumf, r=16%2F%282pi%29=8%2Fpi.

highlight%28v=%284%2F3%29pi%288%2Fpi%29%5E3%29-------you take it from here.
(The rendering puts one of the pi into the wrong position. That is not an exponent. The raised "3" is an exponent, but the other raised number, pi is a FACTOR.)