document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=720800>Question 720800</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A 40 gallon barrel is filled completely with pure water. Salt water with concentration of 0.4lb/gal is the pumped into the barrel, and the resulting mixture overflows at the same rate. The amount of salt in the barrel at time T is given by:\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "     Q(T)=18(1-e^-0.06T)\r<BR>\n" );
document.write( "\n" );
document.write( "where T is measured in minutes and Q(t) is measured in pounds.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "A.)How much salt is in the barrel after 5 minutes?<BR>\n" );
document.write( "B.)How much salt is in the barrel after 12.5 minutes? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #442052 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=442052\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+Q%28t%29+=+18%2A%28+1+-+e%5E%28-.06t%29+%29 ALIGN=MIDDLE  ALT=\"+Q%28t%29+=+18%2A%28+1+-+e%5E%28-.06t%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=+Q%28t%29+ ALIGN=MIDDLE  ALT=\"+Q%28t%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > is in pounds<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > is in minutes<BR>\n" );
document.write( "(a)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+Q%285%29+=+18%2A%28+1+-+e%5E%28-.06%2A5%29+%29 ALIGN=MIDDLE  ALT=\"+Q%285%29+=+18%2A%28+1+-+e%5E%28-.06%2A5%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=+Q%285%29+=+18%2A%28+1+-+e%5E%28-.3%29+%29 ALIGN=MIDDLE  ALT=\"+Q%285%29+=+18%2A%28+1+-+e%5E%28-.3%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=+Q%285%29+=+18+-+18%2Ae%5E%28-.3%29+ ALIGN=MIDDLE  ALT=\"+Q%285%29+=+18+-+18%2Ae%5E%28-.3%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+Q%285%29+=+18+-+18+%2F+e%5E.3+ ALIGN=MIDDLE  ALT=\"+Q%285%29+=+18+-+18+%2F+e%5E.3+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+Q%285%29+=+18+-+18+%2F+1.3499+ ALIGN=MIDDLE  ALT=\"+Q%285%29+=+18+-+18+%2F+1.3499+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+Q%285%29+=+18+-+13.3347+ ALIGN=MIDDLE  ALT=\"+Q%285%29+=+18+-+13.3347+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+Q%285%29+=+4.6653+ ALIGN=MIDDLE  ALT=\"+Q%285%29+=+4.6653+\"   DISABLED_style= \"max-width:90%; height:auto;\" > pounds<BR>\n" );
document.write( "(b)<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+Q%2812.5%29+=+18+-+18%2Fe%5E.75+ ALIGN=MIDDLE  ALT=\"+Q%2812.5%29+=+18+-+18%2Fe%5E.75+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+Q%2812.5%29+=+18+-+18%2F2.117+ ALIGN=MIDDLE  ALT=\"+Q%2812.5%29+=+18+-+18%2F2.117+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+Q%2812.5%29+=+18+-+8.5026+ ALIGN=MIDDLE  ALT=\"+Q%2812.5%29+=+18+-+8.5026+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+Q%2812.5%29+=+9.4974+ ALIGN=MIDDLE  ALT=\"+Q%2812.5%29+=+9.4974+\"   DISABLED_style= \"max-width:90%; height:auto;\" > pounds<BR>\n" );
document.write( "Here's a plot of this function:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+graph%28+400%2C+400%2C+-4%2C+16%2C+-4%2C+16%2C+18%2A%28+1+-+e%5E%28-.06x%29%29+%29+ ALIGN=MIDDLE  ALT=\"+graph%28+400%2C+400%2C+-4%2C+16%2C+-4%2C+16%2C+18%2A%28+1+-+e%5E%28-.06x%29%29+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );