document.write( "Question 728395: If the radius of a circle is reduced by 10 percent, by what percent is the area decreased?
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document.write( "...My anwser is 20 percent. \n" );
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Algebra.Com's Answer #445413 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! If the radius of a circle is reduced by 10 percent, by what percent is the area decreased? \n" ); document.write( "--------------- \n" ); document.write( "The radius is decreased to 0.9 of the original \n" ); document.write( "Area is a function of the square of the radius --> Area is decreased to 0.9^2 of the original = 0.81 \n" ); document.write( "--> 19% decrease \n" ); document.write( " \n" ); document.write( " |