document.write( "Question 878555: if each edge of a square is decreased %10 how does the area changes? \n" ); document.write( "
Algebra.Com's Answer #530062 by Alan3354(69443)\"\" \"About 
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Surface area is a function of the square of the dimensions.
\n" ); document.write( "SA = k*s^2
\n" ); document.write( "SA*x = k*(0.9s)^2 = k*0.81s^2
\n" ); document.write( "--> 19% decrease
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