document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=38318>Question 38318</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A golf ball is hit into the air. The path of the ball can be described by the equation h=70t-5t(squared) where h is the height of the ball in meters and t is the time in seconds.\r<BR>\n" );
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document.write( "A. how high is the ball after 3 seconds<BR>\n" );
document.write( "B. after how many seconds will the ball be 169 meters high<BR>\n" );
document.write( "C. when will the ball hit the ground?\r<BR>\n" );
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document.write( "~Thanx,<BR>\n" );
document.write( "Steve </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #23801 by </B><A HREF=/tutors/aboutme.mpl?userid=Nate><B>Nate(3500)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Nate><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=23801\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A. how high is the ball after 3 seconds<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h=70%283%29-5%283%29%5E2 ALIGN=MIDDLE  ALT=\"h=70%283%29-5%283%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h=210-45 ALIGN=MIDDLE  ALT=\"h=210-45\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h=165 ALIGN=MIDDLE  ALT=\"h=165\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "B. after how many seconds will the ball be 169 meters high<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=169=70%28t%29-5%28t%29%5E2 ALIGN=MIDDLE  ALT=\"169=70%28t%29-5%28t%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-5%28t%29%5E2%2B70t-169=0 ALIGN=MIDDLE  ALT=\"-5%28t%29%5E2%2B70t-169=0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "'t' is either <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-70+%2B+%281520%29%5E%281%2F2%29%29%2F%28-10%29%29 ALIGN=MIDDLE  ALT=\"%28-70+%2B+%281520%29%5E%281%2F2%29%29%2F%28-10%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-70+-+%281520%29%5E%281%2F2%29%29%2F%28-10%29%29 ALIGN=MIDDLE  ALT=\"%28-70+-+%281520%29%5E%281%2F2%29%29%2F%28-10%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The answer is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-70+-+%281520%29%5E%281%2F2%29%29%2F%28-10%29%29 ALIGN=MIDDLE  ALT=\"%28-70+-+%281520%29%5E%281%2F2%29%29%2F%28-10%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > because you can not have a negative time. The answer is about 10.8987<BR>\n" );
document.write( "C. when will the ball hit the ground?<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0=70%28t%29-5%28t%29%5E2 ALIGN=MIDDLE  ALT=\"0=70%28t%29-5%28t%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0=t%2870-5t%29 ALIGN=MIDDLE  ALT=\"0=t%2870-5t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "set to zero (use product property)<BR>\n" );
document.write( "t=0<BR>\n" );
document.write( "70-5t=0<BR>\n" );
document.write( "-5t=-70<BR>\n" );
document.write( "t=14<BR>\n" );
document.write( "The ball will hit the ground after 14 seconds. </SPAN>\n" );
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