document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1133907>Question 1133907</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Fred bought a car for $5,600 and later sold it at 90% of the cost price. He spent $1,310 out of the amount received and invested the rest at 6% per annum simple interest. Calculate the interest earned in 3 years. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #751217 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=751217\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "One response shows the total value of the investment, whereas the question only asked for the amount of interest.<br><BR>\n" );
document.write( "Another response looks as if they are doing the right calculations; but they apparently hit some wrong keys on their calculator.<br><BR>\n" );
document.write( "The third response shows the right answer, but without showing any work; so it is maybe of little use to you.<br><BR>\n" );
document.write( "The right calculations are these:<br><BR>\n" );
document.write( "$5600*0.90 = $5040  [he sold it for 90% of what he paid for it]<BR>\n" );
document.write( "$5040-$1310 = $3730   [he spent $1310 of it]<BR>\n" );
document.write( "$3730*0.06*3 = $671.40   [interest = principal (original amount) times rate (annual percentage) times time (years)] </SPAN>\n" );
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