document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=724419>Question 724419</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A projectile is fired upward with an initial velocity of 588 m/sec.  After how many minutes will it hit the ground?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #443768 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=443768\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If that projectile is fired from ground level, its height (in meters) t seconds after being shot would be give by the equation<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h=588t-4.9t%5E2 ALIGN=MIDDLE  ALT=\"h=588t-4.9t%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > (the 4.9 number is half of the acceleration of gravity in <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m%2Fs%5E2 ALIGN=MIDDLE  ALT=\"m%2Fs%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > ).<BR>\n" );
document.write( "Solving <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-4.9t%5E2%2B588t=0 ALIGN=MIDDLE  ALT=\"-4.9t%5E2%2B588t=0\"   DISABLED_style= \"max-width:90%; height:auto;\" > would give us the time when it hits the ground.<BR>\n" );
document.write( "Dividing both sides of the equation by <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-4.9 ALIGN=MIDDLE  ALT=\"-4.9\"   DISABLED_style= \"max-width:90%; height:auto;\" > we get<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t%5E2-120t=0 ALIGN=MIDDLE  ALT=\"t%5E2-120t=0\"   DISABLED_style= \"max-width:90%; height:auto;\" > so the projectile is at ground level at t=0 (we knew that) and at t=120, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28120+seconds%29 ALIGN=MIDDLE  ALT=\"highlight%28120+seconds%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.<BR>\n" );
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