document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=211356>Question 211356</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How long will it take for the population of a certain country to triple if its annual growth rate is 2.8%? (Round to the nearest year.) Use the exponential growth model P(t) = P0ekt </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #159726 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=159726\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How long will it take for the population of a certain country to triple if its annual growth rate is 2.8%? (Round to the nearest year.) Use the exponential growth model P(t) = P0ekt<BR>\n" );
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document.write( "P(t) = P0*e^kt<BR>\n" );
document.write( "3P0 = P0*e^0.028t<BR>\n" );
document.write( "e^0.028t = 3<BR>\n" );
document.write( "0.028t = ln(3)<BR>\n" );
document.write( "t = ln(3)/0.028<BR>\n" );
document.write( "t = 39 years<BR>\n" );
document.write( " </SPAN>\n" );
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