The radius of a circle is 10 cm. What is the volume?

I believe the answer is 4,188.79

The 3-dimensional shape of a circle is a sphere. In order to solve the volume (v) of a sphere from the radius or diameter of any circumscribed circle within is as follows:

v = 4/3 * pi * r^3, where pi roughly = 3.14

v = 4/3 * 3.14 * (10cm) ^3

v = 1.33 * 3.14 * 1000cm^3

v = 4,188.56 cm^3 (cubic cm)

v = 4,189 cm^3 (rounded up)