Question

The radius of a circle is 20 centimeters.

What is the circumference, in centimeters, of the circle? Round your answer to
the nearest tenth.
Response:

Answer 1

circle formula - 4/3(pi)r^3
substituting in the radius makes the equation 3/4(pi)20^3
which equals 33,493.333333..
to the nearest tenth the answer is 33,493.3 :)

Answer 2

The circumference is 125.7cm