SOLVED: Use the formula A = πd^2 for the surface area of a sphere. This formula yields the surface area in square units. The Hoberman Sphere is a mechanical toy that expands from 5.9 inches in diameter when fully closed to 30 inches in diameter when fully expanded. What is the difference in surface area when it is fully closed compared to when it is fully expanded? Round the result to three decimal places. Enter the number.

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