document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=117873>Question 117873</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A ball is thrown upward from the roof of a building 100 m tall with an initial velocity of 20 m/s. \r<BR>\n" );
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document.write( "When will the ball reach a height of 80 m?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #85888 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20849)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=85888\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> First we need to find out <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=how ALIGN=MIDDLE  ALT=\"how\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+high ALIGN=MIDDLE  ALT=\"+high\"   DISABLED_style= \"max-width:90%; height:auto;\" > the ball will go <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=before ALIGN=MIDDLE  ALT=\"before\"   DISABLED_style= \"max-width:90%; height:auto;\" > it starts falling back to Earth.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+20%2F%289.81%29 ALIGN=MIDDLE  ALT=\"t+=+20%2F%289.81%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+=+v%5Bo%5Dt+%2B+%281%2F2%29at%5E2 ALIGN=MIDDLE  ALT=\"s+=+v%5Bo%5Dt+%2B+%281%2F2%29at%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+=+20%282.04%29+%2B+%281%2F2%29%28-9.81%29%282.04%29%5E2 ALIGN=MIDDLE  ALT=\"s+=+20%282.04%29+%2B+%281%2F2%29%28-9.81%29%282.04%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+=+20%282.04%29+%2B+4.9%2A4.16 ALIGN=MIDDLE  ALT=\"s+=+20%282.04%29+%2B+4.9%2A4.16\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+=+40.8+-+20.4 ALIGN=MIDDLE  ALT=\"s+=+40.8+-+20.4\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=s+=+%2820.4%29+m ALIGN=MIDDLE  ALT=\"s+=+%2820.4%29+m\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Now <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=to ALIGN=MIDDLE  ALT=\"to\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+get ALIGN=MIDDLE  ALT=\"+get\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+to ALIGN=MIDDLE  ALT=\"+to\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+80m ALIGN=MIDDLE  ALT=\"+80m\"   DISABLED_style= \"max-width:90%; height:auto;\" > it must travel back the <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=20.4m ALIGN=MIDDLE  ALT=\"20.4m\"   DISABLED_style= \"max-width:90%; height:auto;\" > to the top of the roof and<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+then ALIGN=MIDDLE  ALT=\"+then\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+fall ALIGN=MIDDLE  ALT=\"+fall\"   DISABLED_style= \"max-width:90%; height:auto;\" > another <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=20+m ALIGN=MIDDLE  ALT=\"20+m\"   DISABLED_style= \"max-width:90%; height:auto;\" > for a total of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2840.4%29+m ALIGN=MIDDLE  ALT=\"%2840.4%29+m\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=40.4+=+%281%2F2%29%289.81%29t%5E2 ALIGN=MIDDLE  ALT=\"40.4+=+%281%2F2%29%289.81%29t%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+%282.87%29+s ALIGN=MIDDLE  ALT=\"t+=+%282.87%29+s\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "The <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=total ALIGN=MIDDLE  ALT=\"total\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+time ALIGN=MIDDLE  ALT=\"+time\"   DISABLED_style= \"max-width:90%; height:auto;\" > is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282.04%29s+%2B+%282.87%29s+=+%284.91%29+s ALIGN=MIDDLE  ALT=\"%282.04%29s+%2B+%282.87%29s+=+%284.91%29+s\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
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