Question

What the radius of a circle with an area of 64 square feet

Answer 1

4.51 ft

Explanation:

Answer 2

a=pir²
64=pir²
divide both sides by pi
64/pi=r²
sqrt both sides
8/√pi=r
(8√pi)/pi=r
aprox
4.51352=r

about 4.5ft is the radius