document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=929060>Question 929060</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello, \r<BR>\n" );
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document.write( "I don't know how to solve this problem:\r<BR>\n" );
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document.write( "A cup of coffee which is initially at a temperature of 154 degrees Fahrenheit is placed in a room which is at a constant temperature of 71 degrees.  In 10 minutes, the coffee has cooled to 133 degrees.  Find the Newton's Law of Cooling formula that models the coffee's temperature in t minutes.  Determine to the nearest minute how long it will take the coffee to cool to a temperature of 100 degrees Fahrenheit.  \r<BR>\n" );
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document.write( "Thank you in advance,\r<BR>\n" );
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document.write( "Ryan M. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #564285 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=564285\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> First off, find Newton's law of cooling,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=k%28t%5B1%5D-t%5B2%5D%29=-ln%28%28T%5B1%5D-T%5Binfinity%5D%29%2F%28T%5B2%5D-T%5Binfinity%5D%29%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Use the two data points given to find <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=k ALIGN=MIDDLE  ALT=\"k\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
document.write( "At <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=0 ALIGN=MIDDLE  ALT=\"t=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=T=154 ALIGN=MIDDLE  ALT=\"T=154\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "At <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=10 ALIGN=MIDDLE  ALT=\"t=10\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=T=133 ALIGN=MIDDLE  ALT=\"T=133\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=k%280-10%29=-ln%28%28154-71%29%2F%28133-71%29%29 ALIGN=MIDDLE  ALT=\"k%280-10%29=-ln%28%28154-71%29%2F%28133-71%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-10k=-0.291716 ALIGN=MIDDLE  ALT=\"-10k=-0.291716\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=k=0.02917 ALIGN=MIDDLE  ALT=\"k=0.02917\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ".<BR>\n" );
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document.write( "So now find <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t ALIGN=MIDDLE  ALT=\"t\"   DISABLED_style= \"max-width:90%; height:auto;\" > when <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=T=100 ALIGN=MIDDLE  ALT=\"T=100\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<BR>\n" );
document.write( "Then,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0.02917%280-t%29=-ln%28%28154-71%29%2F%28100-71%29%29 ALIGN=MIDDLE  ALT=\"0.02917%280-t%29=-ln%28%28154-71%29%2F%28100-71%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-0.02917t=-1.0515 ALIGN=MIDDLE  ALT=\"-0.02917t=-1.0515\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=36.05 ALIGN=MIDDLE  ALT=\"t=36.05\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=minutes ALIGN=MIDDLE  ALT=\"minutes\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "To the nearest minute, <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t=36 ALIGN=MIDDLE  ALT=\"t=36\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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