document.write( "Question 319451: The radius of a circle is increased by 100%. By what percent was the area of the circle increased? \n" ); document.write( "
Algebra.Com's Answer #228751 by Alan3354(69443)\"\" \"About 
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Area is a function of the square of the radius.
\n" ); document.write( "2 times r --> 2^2 times area
\n" ); document.write( "= 4 times
\n" ); document.write( "= 300% increase
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