<PRE><B>Question 1026284</B>
The formula C=2pir is used to calculate the circumference of a circle when given the radius. What is the formula for calculating the radius when give the circumference? 
C = 2*pi*r
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Divide both sides by 2pi to get::
r = C/(2pi)
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Cheers,
Stan H.
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A. C/2pi =r
B. C/2r =pi
C. 2piC=r
D. 2pi/C=r </PRE>