document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=745513>Question 745513</A>: <I><SPAN STYLE=\"word-break: break-all;\"> THE HEIGHT OF THE ROCKET AFTER t SECONDS WHEN FIRED STRAIGHT UP WITH AN INITIAL SPEED OF 150FT PER SECOND FROM AN INITIAL HEIGHT OF 2 CAN BE MODELED BY THE FUNCTION:  s(t)=-16t^2+150t+2\r<BR>\n" );
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document.write( "WHEN WILL THE ROCKET BE 300ft?<BR>\n" );
document.write( "WHAT IS THE MEANING OF THE Y INTERCEPT<BR>\n" );
document.write( "WHEN WILL IT REACH THE GROUND?\r<BR>\n" );
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document.write( "I AM UNSURE OF HOW TO START THE PROBLEM. DO I USE THE QUADRATIC FORMULA?  <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 #453866 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=453866\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s%28t%29++=+-16t%5E2+%2B+150t+%2B+2+ ALIGN=MIDDLE  ALT=\"+s%28t%29++=+-16t%5E2+%2B+150t+%2B+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s%28t%29+ ALIGN=MIDDLE  ALT=\"+s%28t%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > is the height of the rocket from the ground<BR>\n" );
document.write( "If you want the height to be <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+300+ ALIGN=MIDDLE  ALT=\"+300+\"   DISABLED_style= \"max-width:90%; height:auto;\" > ft, then<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+s%28t%29+=+300+ ALIGN=MIDDLE  ALT=\"+s%28t%29+=+300+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+300++=+-16t%5E2+%2B+150t+%2B+2+ ALIGN=MIDDLE  ALT=\"+300++=+-16t%5E2+%2B+150t+%2B+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+-16t%5E2+%2B+150t+-+298+=+0+ ALIGN=MIDDLE  ALT=\"+-16t%5E2+%2B+150t+-+298+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Divide through by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+2+ ALIGN=MIDDLE  ALT=\"+2+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+-8t%5E2+%2B+75t+-+149+=+0+ ALIGN=MIDDLE  ALT=\"+-8t%5E2+%2B+75t+-+149+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Use quadratic wquation<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+%28-b+%2B-+sqrt%28+b%5E2+-+4%2Aa%2Ac+%29%29+%2F+%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"+t+=+%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=+a+=+-8+ ALIGN=MIDDLE  ALT=\"+a+=+-8+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+b+=+75+ ALIGN=MIDDLE  ALT=\"+b+=+75+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+c+=+-149+ ALIGN=MIDDLE  ALT=\"+c+=+-149+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+%28-75+%2B-+sqrt%28+75%5E2+-+4%2A%28-8%29%2A%28-149%29+%29%29+%2F+%282%2A%28-8%29%29+ ALIGN=MIDDLE  ALT=\"+t+=+%28-75+%2B-+sqrt%28+75%5E2+-+4%2A%28-8%29%2A%28-149%29+%29%29+%2F+%282%2A%28-8%29%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+%28-75+%2B-+sqrt%28+5625+-+4768+%29%29+%2F+%28-16%29+ ALIGN=MIDDLE  ALT=\"+t+=+%28-75+%2B-+sqrt%28+5625+-+4768+%29%29+%2F+%28-16%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+%28-75+%2B-+sqrt%28+857+%29%29+%2F+%28-16%29+ ALIGN=MIDDLE  ALT=\"+t+=+%28-75+%2B-+sqrt%28+857+%29%29+%2F+%28-16%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+%28-75+%2B+29.275%29+%2F+%28-16%29+ ALIGN=MIDDLE  ALT=\"+t+=+%28-75+%2B+29.275%29+%2F+%28-16%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+-45.725%2F%28-16%29+ ALIGN=MIDDLE  ALT=\"+t+=+-45.725%2F%28-16%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+2.858+ ALIGN=MIDDLE  ALT=\"+t+=+2.858+\"   DISABLED_style= \"max-width:90%; height:auto;\" > sec<BR>\n" );
document.write( "In 2.858 sec the height of the rocket will be 300 ft<BR>\n" );
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document.write( "I have to run now- check my math. The method <BR>\n" );
document.write( "should be OK<BR>\n" );
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