document.write( "Question 1044022: What is the expression for the area of the circle which has a circumference of C? Express your answers as a rational expression in terms of C and pi.
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\n" ); document.write( "In China, spheres are used to exercise a person's hands. if the diameter of a sphere is 2 inches how many square inches are in its surface area express your answer in terms of pi
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Algebra.Com's Answer #659245 by addingup(3677)\"\" \"About 
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circumference of the circle:
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\n" ); document.write( "pi*r^2
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\n" ); document.write( "4*pi*r^2 area
\n" ); document.write( "4*pi*2^2 = area
\n" ); document.write( "4*4*pi = area
\n" ); document.write( "16pi = area
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