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Mathematics 13 Online
OpenStudy (anonymous):

George makes large cookies. These cookies are 18 inches in diameter. How much icing will he need to cover the top of each cookie? 18π in2 324π in2 81π in2 9π in2

OpenStudy (anonymous):

πr^2 18/2=9 (radius) 9^2=81 81π in2

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