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27 October, 22:42

The area of a round mat is 64 pie square inches. what is the diameter of the mat?

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  1. 27 October, 23:45
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    area of a circle

    area = pi r ^2

    64 = 3.14 x r ^2

    divide both sides by 3.14

    20.38 = r^2

    square root of 20.38

    4.51 = r

    diameter is twice the radius

    4.51 + 4.51 = 9.02
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