If the area of a circle is 36pi square feet, find its circumference.	Pick.
A) 12 pi feet
B) 28 pi feet
C) 38 pi feet
D) 48 pi feet
E) 58 pi feet
The area is given by pi *r* r. Hence   pi * r *r = 36 pi   r * r = 36; hence r = 36 feet   The circumference is given by   2 * pi * r = 2 * pi * 6 = 12 pi feet   correct answer 12 pi feet
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If the area of a circle is 36pi square feet, find its circumference.