document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=338648>Question 338648</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The Cost C of manufacturing a certain product can be estimated by the formula <BR>\n" );
document.write( "C = 0.03rst^2, where r and s are the amounts in pounds, of the two major ingredients and t is the production time in hours. If r is increased by 50 percent, s is increased by 20 percent, and t is decreased by 30 percent, by approximately what percent will the estimated cost of manufacturing the product change?\r<BR>\n" );
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document.write( "(A) 40% increase<BR>\n" );
document.write( "(B) 12% increase<BR>\n" );
document.write( "(C) 4% increase<BR>\n" );
document.write( "(D) 12% decrease<BR>\n" );
document.write( "(E) 24% decrease\r<BR>\n" );
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document.write( "The answer is(D) 12% decrease but I am getting 26%. Could you please explain.\r<BR>\n" );
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document.write( "Thanks<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #242712 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=242712\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> See <a  rel=nofollow HREF=\"http://www.algebra.com/algebra/homework/percentage/percentage.faq.question.3655.html\">this previous solution</a>. Let me know if you still need more help. </SPAN>\n" );
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