The product of two inches and the circumference of a circle, in inches, is equal to the circle's area. What is the length of the radius of the circle, in inches?
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If that is so, the 4rπ is equal ro r^2π divide both sides by rπ to get r=4
2 * 2pi * r = pi * r^2 divide out pi
4 r = r^2 divide by r on both sides
4 = r
+100 
+539 
