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OpenStudy (anonymous):
Write an expression in simplest form for the area of a circle with a radius of 4r. Use 3.14 for pi. A. 3.24r^2 B. 50.24r^2 C. 12.56r^2 D. 12.56r
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OpenStudy (hoblos):
area of a circle= pi*R^2 = 3.14*16r^2 = 50.24r^2
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