document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=404056>Question 404056</A>: <I><SPAN STYLE=\"word-break: break-all;\"> My teacher gave me a problem to solve and we've been doing these kind off equations all week and I just don't get them....The growth rate of the world is 2.67% per year.If the present population of earth is 8 billion people, how long before the population doubles? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #285590 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=285590\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The growth rate of the world is 2.67% per year.If the present population of earth is 8 billion people, how long before the population doubles?<BR>\n" );
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document.write( "A(t) = ab^x<BR>\n" );
document.write( "16 = 8(1+0.0267)^x<BR>\n" );
document.write( "---<BR>\n" );
document.write( "1.0267^x = 2<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x(log(1.0267)) = log(2)<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x = log(2)/log(1.0267)<BR>\n" );
document.write( "---<BR>\n" );
document.write( "x = 26.31 years<BR>\n" );
document.write( "=================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );