document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=912579>Question 912579</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find how long it takes a $1600 investment to earn $500 interest if it is invested at 4% interest compounded quarterly </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #553897 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=553897\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In General <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=A%28t%29+=+P%281%2Br%2Fn%29%5E%28nt%29 ALIGN=MIDDLE  ALT=\"A%28t%29+=+P%281%2Br%2Fn%29%5E%28nt%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "A = Accumulated Amount<BR>\n" );
document.write( "P= principal = <BR>\n" );
document.write( "r= annual rate = .<BR>\n" );
document.write( "n= periods per year = <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2100+=+1600%281.01%29%5E%284t%29 ALIGN=MIDDLE  ALT=\"2100+=+1600%281.01%29%5E%284t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "log(1.3125)/4log(1.01) = t <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );