A wooden ball has a surface of about 531square centimeters. What is the radius of the wooden ball in centimeters? Round to the nearest tenth.
Since the ball is a sphere, its surface area is given by
SA = 4*pi*r2 So we have
531 = 4*pi*r2 Divide on both sides by 4*pi....we have
531/(4*pi) = r2 Take the square root of both sides
r ≈ 6.5 cm
