Rewrite the formula to find the radius of a sphere. the volume (v) of a sphere is given by the formula v=4/3 pi r^2

It is r^3 in the volume formula.

V=(4πr^3)/3  multiply both sides by 3

3V=4πr^3  divide both sides by 4π

r^3=3V/(4π)  take the cube root of both sides

r=((3V)/(4π))^(1/3)

Well in order to lose a pound you would have to burn 1,500 calories. the more calories you burn the more weight you lose. in order to lose 2 pounds you would have to run 4 hours and 28 minutes.