document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=22890>Question 22890</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The time necessary T to make an enlargement of a photo negative varies directly as the area of the enlargement. If 108 seconds are required to make a 3-by-4 inch enlargement, find the time required to make a 6-by-8 inch  enlargement.  <BR>\n" );
document.write( "A. 384 seconds<BR>\n" );
document.write( "B. 528 seconds<BR>\n" );
document.write( "C. 480 seconds<BR>\n" );
document.write( "D. 432 seconds </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #11486 by </B><A HREF=/tutors/aboutme.mpl?userid=rapaljer><B>rapaljer(4671)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rapaljer><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/cgi-bin/show-face.mpl?user=rapaljer><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=11486\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Step 1:  Write an equation relating the variables using k for a constant:<BR>\n" );
document.write( "T=kA\r<BR>\n" );
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document.write( "Step 2:  Substitute one complete set of variables and solve for k:<BR>\n" );
document.write( "T=kA<BR>\n" );
document.write( "108 = k*12\r<BR>\n" );
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document.write( "Divide by 12:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=108%2F12=+%2812k%29%2F12 ALIGN=MIDDLE  ALT=\"108%2F12=+%2812k%29%2F12\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=9=k ALIGN=MIDDLE  ALT=\"9=k\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Step 3:  Use this value of k to answer the question about T.\r<BR>\n" );
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document.write( "The question is to find T when A= 6*8 = 48:<BR>\n" );
document.write( "T=9A<BR>\n" );
document.write( "T= 9*48<BR>\n" );
document.write( "T= 432 seconds, which would be D.\r<BR>\n" );
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document.write( "R^2 at SCC\r<BR>\n" );
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document.write( " </SPAN>\n" );
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