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Mathematics 16 Online
OpenStudy (hockey1):

SA = 4πr2 Leah has two congruent beach balls. The diameter of one ball is 20 inches. Which choice is the closest for the surface area of the second ball? A) 1,257 in2 B) 4,189 in2 C) 5,027 in2 D) 20,106 in2

OpenStudy (hockey1):

i know that. but i dont know how to find the answer

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