document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1039797>Question 1039797</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You buy a commemorative coin for $20. The value of the coin increases at a rate of 3.5% per year. \r<BR>\n" );
document.write( "\n" );
document.write( "How much will the coin be worth in 15 years?\r<BR>\n" );
document.write( "\n" );
document.write( "After how many years will the coin have doubled in value? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #654554 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=654554\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+V+ ALIGN=MIDDLE  ALT=\"+V+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = the current value of the coin<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+V+=+20%2A%28+1+%2B+.035+%29%5E15+ ALIGN=MIDDLE  ALT=\"+V+=+20%2A%28+1+%2B+.035+%29%5E15+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+V+=+20%2A1.035%5E15+ ALIGN=MIDDLE  ALT=\"+V+=+20%2A1.035%5E15+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+V+=+20%2A1.6753+ ALIGN=MIDDLE  ALT=\"+V+=+20%2A1.6753+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+V+=+33.507+ ALIGN=MIDDLE  ALT=\"+V+=+33.507+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The coin will be worth $33.51 in 15 yrs<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "Double the value of the coin is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2%2A20+=+40+ ALIGN=MIDDLE  ALT=\"+2%2A20+=+40+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Let <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+ ALIGN=MIDDLE  ALT=\"+t+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = time in years when coin is worth $40<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+40+=+20%2A1.035%5Et+ ALIGN=MIDDLE  ALT=\"+40+=+20%2A1.035%5Et+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2+=+1.035%5Et+ ALIGN=MIDDLE  ALT=\"+2+=+1.035%5Et+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Take the log of both sides<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+log%282%29+=+t%2Alog%28+1.035+%29+ ALIGN=MIDDLE  ALT=\"+log%282%29+=+t%2Alog%28+1.035+%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+.30103+=+.01494t+ ALIGN=MIDDLE  ALT=\"+.30103+=+.01494t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+.30103%2F.01494+ ALIGN=MIDDLE  ALT=\"+t+=+.30103%2F.01494+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+20.1488+ ALIGN=MIDDLE  ALT=\"+t+=+20.1488+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The coin will double in value in the 20th year </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );