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Find the surface area of a sphere with a diameter of 40 inches. Leave your answer in terms of pi
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GPT-5 mini
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Radius = 40/2 = 20 in.
Surface area = 4πr^2 = 4π(20^2) = 4π(400) = 1600π in².
Surface area = 4πr^2 = 4π(20^2) = 4π(400) = 1600π in².
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