document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=891581>Question 891581</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How much do you need to invest if the intrest rate is 5% and you need a total of $1800 in 4 years?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #539956 by </B><A HREF=/tutors/aboutme.mpl?userid=LinnW><B>LinnW(1048)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=LinnW><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=LinnW><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=539956\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let x = the amount needed<BR>\n" );
document.write( "x*(1+0.05)^4 = 1800<BR>\n" );
document.write( "x*(1.05)^4 = 1800<BR>\n" );
document.write( "x*(1.2155065) = 1800<BR>\n" );
document.write( "divide each side by (1.2155065)<BR>\n" );
document.write( " x = 1800/(1.2155065)<BR>\n" );
document.write( " x = 1480.86<BR>\n" );
document.write( "checking,<BR>\n" );
document.write( "1480.86*(1.05)^4 = 1799.994 so we are very close </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );