document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1032719>Question 1032719</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A hard boiled egg has a temperature of 98 degrees celsius. If it is put into a sink that maintains a temperature of 18 degrees celsius, its temperature x minutes later is given by<BR>\n" );
document.write( " T(x) = 18+80e ^-0.28x. Hilda needs her egg to be exactly 30 degrees celsius for decorating. How long should she leave it in the water?\r<BR>\n" );
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document.write( "I am confused on how to set this equation up properly.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #647331 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=647331\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+30+=+T%28x%29+=+18%2B80e%5E%28-0.28x%29 ALIGN=MIDDLE  ALT=\"+30+=+T%28x%29+=+18%2B80e%5E%28-0.28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "==> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12+=+80e%5E%28-0.28x%29 ALIGN=MIDDLE  ALT=\"12+=+80e%5E%28-0.28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "==> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.15+=+e%5E%28-0.28x%29 ALIGN=MIDDLE  ALT=\"0.15+=+e%5E%28-0.28x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "==> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+-ln0.15%2F0.28+=+6.78 ALIGN=MIDDLE  ALT=\"x+=+-ln0.15%2F0.28+=+6.78\"   DISABLED_style= \"max-width:90%; height:auto;\" >minutes </SPAN>\n" );
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