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Mathematics

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the circumference of a circle is 11 pi. what is the are, in square inches, of the circle? express your answer in terms of pi

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Explanation & Answer

The circumference C = 2 pi r, where r is the radius of the circle, hence, r = 11 pi / 2 pi = 11/2 = 5.5 in as it seems to be the unit in which C is measured.

The area of the  circle A = pi r^2 = pi 5.5^2 = 30.25 pi in^2  (approximately 95.0 in^2).


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