document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=42664>Question 42664</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0618219560/algebrahomeworkh>functions and change</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> The concentration C = C(t) of chlorine in the tank t hours after flushing begins is given by C=0.1+2.78e to the -0.37t mpg.<BR>\n" );
document.write( "-what is the initial concentration of chlorine in the tank?<BR>\n" );
document.write( "-express the concentration of chlorine in the tank after 3 hours.\r<BR>\n" );
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document.write( "ps - i need to know how to work the problem specifically.<BR>\n" );
document.write( "Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #27826 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=27826\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Okay, the function we are working with is<BR>\n" );
document.write( "C(t) = 0.1 + 2.78e^(-0.37t)<BR>\n" );
document.write( "The initial concentration is when t = 0, so<BR>\n" );
document.write( "C(0) = 0.1 + 2.78e^0 = 2.88<BR>\n" );
document.write( "After three hours, t = 3, so we have<BR>\n" );
document.write( "C(3) = 0.1 + 2.78e^(-0.37*3) and we use our calculator to get<BR>\n" );
document.write( "C(3) = .916 mpg </SPAN>\n" );
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