document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1130119>Question 1130119</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Could someone please assist with the question: <BR>\n" );
document.write( "A pot of boiling soup with an internal temperature of 100� Fahrenheit was taken off the stove to cool in a 69�F room. After fifteen minutes, the internal temperature of the soup was 93�F. \r<BR>\n" );
document.write( "\n" );
document.write( "To the nearest minute, how long will it take the soup to cool to 81�F? \r<BR>\n" );
document.write( "\n" );
document.write( "Here is my work:<BR>\n" );
document.write( "69+(100-69) * e= 69+31*e<BR>\n" );
document.write( "93=69+31*e(-k*15)<BR>\n" );
document.write( "31*e^(-k *15)= 93-69= 24<BR>\n" );
document.write( "e^-15k= 24/31= .7742<BR>\n" );
document.write( "-15K= ln(.7742)<BR>\n" );
document.write( "k= -ln(0.7742)/ 15=0.017\r<BR>\n" );
document.write( "\n" );
document.write( "T(t)=  69+31*e (0.017)=81<BR>\n" );
document.write( "e(-0.017*t)= 81-69/31=.387<BR>\n" );
document.write( "-0.017*t= ln(.387)<BR>\n" );
document.write( "t= - ln (.387)/ (0.017)= 55.8 min<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #853975 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(53742)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=853975\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Hello, in your post (in your problem's formulation), there is a fatal error,<BR>\n" );
document.write( "which equates the problem's creator to zero.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Concretely, the boiling temperature of 100 degrees Celsius is missed with 100 degrees Fahrenheit, <BR>\n" );
document.write( "which has no any relation to boiling.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );