document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1137232>Question 1137232</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use the exponential regression function f(t) = 1.5703e .03x to estimate the amount of board feet (in 100’s of feet) for a 140 year old tree. (No work required.) \r<BR>\n" );
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document.write( "EXTRA CREDIT (6 points) Show algebraic work (no extra credit without work.) Estimate the age of a tree that provides 100 board feet (in 100’s of board feet). In other words, solve the equation 100 = 1.5703e .03x for x. (Hint: use logarithms.) <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #755097 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=755097\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> this is 1.570*e^(4.2)=104.72 hundreds of board feet.\r<BR>\n" );
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document.write( "100=1.5703e^.03x, divide by 1.5703<BR>\n" );
document.write( "63.682=e^0.03x<BR>\n" );
document.write( "ln both sides to remove e<BR>\n" );
document.write( "4.1539=0.03x<BR>\n" );
document.write( "divide by 0.03 both sides<BR>\n" );
document.write( "x=138.46 years </SPAN>\n" );
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