Surface area = 4*pi*22 = 50.265 square inches to 3 d.p.
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8.86683 square inches. (Area=4 X pi X radius squared) diameter of ball = 1.68 inches.
Surface area of the ball = 4*pi*342 = 4624*pi square mm
What is a "8 inch ball" ? Is 8 inches the diameter ? Then its diameter is 8 inches. Is 8 inches the radius ? Then its diameter is 16 inches. Is 8 inches the circumference ? Then its diameter is about 2.546 inches (rounded).
2800 square inches
Surface area = 4*pi*112 = 1520.531 cm2 rounded to 3 d.p.