document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=72144>Question 72144</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0395977258/algebrahomeworkh>Algebra and Trigonometry: Structure and Method </A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> An elevator went from the bottom to the top of a 240 m tower, remained there for 12 s, and returned to the bottom in an elapsed time of 2 min.  If the elevator traveled 1 m/s faster on the way down, find its speed going up. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #51654 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=51654\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> total time = 120 - 12 sec<BR>\n" );
document.write( "total time = 108 sec<BR>\n" );
document.write( "r = rate going up<BR>\n" );
document.write( "t = time to go up<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%2At+%2B+%28r%2B1%29%2A%28108-t%29+=+480 ALIGN=MIDDLE  ALT=\"r%2At+%2B+%28r%2B1%29%2A%28108-t%29+=+480\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%2At+=+240 ALIGN=MIDDLE  ALT=\"r%2At+=+240\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+=+240%2Ft ALIGN=MIDDLE  ALT=\"r+=+240%2Ft\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%2At+%2B+%28r%2B1%29%2A%28108-t%29+=+480 ALIGN=MIDDLE  ALT=\"r%2At+%2B+%28r%2B1%29%2A%28108-t%29+=+480\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=240+%2B+%28r%2B1%29%2A%28108-t%29+=+480 ALIGN=MIDDLE  ALT=\"240+%2B+%28r%2B1%29%2A%28108-t%29+=+480\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=108r+%2B+108+-rt+-+t+=+240 ALIGN=MIDDLE  ALT=\"108r+%2B+108+-rt+-+t+=+240\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=108r+-+240%2Fr+=+372 ALIGN=MIDDLE  ALT=\"108r+-+240%2Fr+=+372\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=108r%5E2+-+372r+-+240+=+0 ALIGN=MIDDLE  ALT=\"108r%5E2+-+372r+-+240+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"r+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+=+%28-%28-372%29+%2B-+sqrt%28+%28-372%29%5E2-4%2A108%2A%28-240%29+%29%29%2F%282%2A108%29+ ALIGN=MIDDLE  ALT=\"r+=+%28-%28-372%29+%2B-+sqrt%28+%28-372%29%5E2-4%2A108%2A%28-240%29+%29%29%2F%282%2A108%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+=+%28372+%2B-+sqrt%28138384+%2B+103680+%29%29%2F216+ ALIGN=MIDDLE  ALT=\"r+=+%28372+%2B-+sqrt%28138384+%2B+103680+%29%29%2F216+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+=+%28372+%2B-+sqrt%28242064+%29%29%2F216+ ALIGN=MIDDLE  ALT=\"r+=+%28372+%2B-+sqrt%28242064+%29%29%2F216+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+=+%28372+%2B+492%29+%2F+216 ALIGN=MIDDLE  ALT=\"r+=+%28372+%2B+492%29+%2F+216\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+=+864%2F216 ALIGN=MIDDLE  ALT=\"r+=+864%2F216\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r+=+4 ALIGN=MIDDLE  ALT=\"r+=+4\"   DISABLED_style= \"max-width:90%; height:auto;\" > m/sec answer<BR>\n" );
document.write( "check answer<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%2At+=+240 ALIGN=MIDDLE  ALT=\"r%2At+=+240\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+240%2F4 ALIGN=MIDDLE  ALT=\"t+=+240%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+60 ALIGN=MIDDLE  ALT=\"t+=+60\"   DISABLED_style= \"max-width:90%; height:auto;\" > sec<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r%2At+%2B+%28r%2B1%29%2A%28108-t%29+=+480 ALIGN=MIDDLE  ALT=\"r%2At+%2B+%28r%2B1%29%2A%28108-t%29+=+480\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%2A60+%2B+%284%2B1%29%2A%28108-60%29+=+480 ALIGN=MIDDLE  ALT=\"4%2A60+%2B+%284%2B1%29%2A%28108-60%29+=+480\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=240+%2B+5%2A48+=+480 ALIGN=MIDDLE  ALT=\"240+%2B+5%2A48+=+480\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=240+%2B+240+=+480 ALIGN=MIDDLE  ALT=\"240+%2B+240+=+480\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );