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OpenStudy (anonymous):
Find the area and the circumference of a circle with radius 9cm . Use the value 3.14 for (pi) , and do not round your answers. Be sure to include the correct units in your answers.
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OpenStudy (mathmagician):
C=2*pi*R=2*3.14*9cm=56.52cm
OpenStudy (anonymous):
is the circumfrance?
OpenStudy (anonymous):
Yes. Area = 3.14 x 9 * 9 = 254.34 units^2
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