document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=869033>Question 869033</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find out how long it take $2500 investment to double if it is invested at 9% compounded quarterly. Round to the nearest tenth of a year. use the formula<BR>\n" );
document.write( "A=P(1+r/n)^nt </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #524407 by </B><A HREF=/tutors/aboutme.mpl?userid=tommyt3rd><B>tommyt3rd(5050)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tommyt3rd><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=tommyt3rd><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=524407\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 5000=2500(1+0.09/4)^(4*t)\r<BR>\n" );
document.write( "\n" );
document.write( "2=(1.0225)^(4t)\r<BR>\n" );
document.write( "\n" );
document.write( "ln2=4t*ln1.0225\r<BR>\n" );
document.write( "\n" );
document.write( "t=7.8 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );