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Mathematics 20 Online
OpenStudy (anonymous):

Help :)

OpenStudy (anonymous):

OpenStudy (jonnyvonny):

So,, to do the first, the formula for the circumference of a circle is: C=2*(pi)*r C= 2*3.14*11 = 69 I would do it by rounding pi to 3, but I used a calculator, and made pi into 3.14, and multiplied, and got 69.08.

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