document.write( "Question 908422: The surface area of a sphere is 137.5cm squared. What is the radius of the sphere to the nearest tenth of a centimeter? I do not know how to work backwards explanations would be great!
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Algebra.Com's Answer #551059 by rfer(16322)\"\" \"About 
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A=4*pi*r^2
\n" ); document.write( "137.5=4*3.14*r^2
\n" ); document.write( "137.5=12.56r^2
\n" ); document.write( "137.5/12.56=r^2
\n" ); document.write( "10.95=r^2
\n" ); document.write( "r=sqrt10.95
\n" ); document.write( "r=3.3cm
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