THE CIRCUMFERENCE OF A CIRCLE IS 31.4 centimeters. What is the area of the circle?

4 answers

C=2pi*r

solve for r...

31.4=6.28r
r=4.9974

A=pi*r^2

A=78.5 centimeters.
excuse me, I got the units of Area incorrect. It should be cm^2. So 78.5 cm^2.
Hsj
no its not