document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=341397>Question 341397</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I'm probably making this seem harder than it looks, but my course papers involve this example of rearranging an equation to make an unknown the subject.\r<BR>\n" );
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document.write( "This is the question in full.\r<BR>\n" );
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document.write( "The surface area (A) of a rectangular prism is given by the formula:\r<BR>\n" );
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document.write( "A=2(bh+hl+lb)\r<BR>\n" );
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document.write( "Evaluate b when A=11750sq mm; h=25mm and l=75mm\r<BR>\n" );
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document.write( "I know the idea is to make b the subject first by rearranging, but I'm having difficulty coming to how to rearrange this formula without changing it beyond its function.\r<BR>\n" );
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document.write( "Please help!\r<BR>\n" );
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document.write( "Thanks\r<BR>\n" );
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document.write( "Craig Jenkins (supposed engineering student.) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #244465 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=244465\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A=2(bh+hl+lb) <BR>\n" );
document.write( "Evaluate b when A=11750sq mm; h=25mm and l=75mm <BR>\n" );
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document.write( "11750 = 2(b*25 + 25*75 + 75b)<BR>\n" );
document.write( "5875 = 25b + 1875 + 75b = 100b + 1875<BR>\n" );
document.write( "100b = 4000<BR>\n" );
document.write( "b = 40 mm<BR>\n" );
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