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21-10-2016
Mathematics

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

Respuesta :

21-10-2016

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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