document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=987544>Question 987544</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Christopher can paint the interior of his house in 15 hours. If he hires Cynthia to help him, they can do the same job together in 9 hours. If he lets Cynthia work alone, how long will it take her to paint the interior of his house? Round your answer to 1 decimal place.\r<BR>\n" );
document.write( "\n" );
document.write( "Start by identifying the given data.\r<BR>\n" );
document.write( "\n" );
document.write( "Christopher can paint the interior of his house in 15 hours. Therefore, he can paint 1/15 of his house per hour.\r<BR>\n" );
document.write( "\n" );
document.write( "Christopher and Cynthia can do the same job together in 9 hours. Therefore, they can paint 1/9 of the house per hour. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #608288 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=608288\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">\r\n" );
document.write( "PAINTERS                       RATE as JOB per HOUR\r\n" );
document.write( "Christopher                      <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F15 ALIGN=MIDDLE  ALT=\"1%2F15\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r\n" );
document.write( "Cynthia                          <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2Fx ALIGN=MIDDLE  ALT=\"1%2Fx\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r\n" );
document.write( "Christopher&Cynthia              <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F9 ALIGN=MIDDLE  ALT=\"1%2F9\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r\n" );
document.write( "</PRE>\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "The rate for Christopher and Cynthia working together is the sum of their individual rates. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );