document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=92924>Question 92924</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am having problems with this word problem. \r<BR>\n" );
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document.write( "The height h in feet of an object after t seconds is given by the function <BR>\n" );
document.write( "h=-16t^2+60t+9<BR>\n" );
document.write( "How long will it take the object to hit the ground. Round to the nearest thousandth. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #67619 by </B><A HREF=/tutors/aboutme.mpl?userid=psbhowmick><B>psbhowmick(878)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=psbhowmick><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=psbhowmick><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=67619\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> When the object will reach ground, then h = 0.<BR>\n" );
document.write( "So <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-16t%5E2+%2B+60t+%2B+9+=+0 ALIGN=MIDDLE  ALT=\"-16t%5E2+%2B+60t+%2B+9+=+0\"   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+-+60t+-+9+=+0 ALIGN=MIDDLE  ALT=\"16t%5E2+-+60t+-+9+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Comparing with the standard form <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ax%5E2+%2B+bx+%2B+c+=+0 ALIGN=MIDDLE  ALT=\"ax%5E2+%2B+bx+%2B+c+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >, here a = 16, b = -60, c = -9.<BR>\n" );
document.write( "From Sreedharacharya's formula<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"x+=+%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=t+=+%28-%28-60%29+%2B-+sqrt%28+%28-60%29%5E2-4%2A16%2A%28-9%29+%29%29%2F%282%2A16%29+ ALIGN=MIDDLE  ALT=\"t+=+%28-%28-60%29+%2B-+sqrt%28+%28-60%29%5E2-4%2A16%2A%28-9%29+%29%29%2F%282%2A16%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > [substituting the values of a, ,b & c]<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+%2860+%2B-+sqrt%28+3600%2B576+%29%29%2F32+ ALIGN=MIDDLE  ALT=\"t+=+%2860+%2B-+sqrt%28+3600%2B576+%29%29%2F32+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+%2860+%2B-+64.622%29%2F32+ ALIGN=MIDDLE  ALT=\"t+=+%2860+%2B-+64.622%29%2F32+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+3.894 ALIGN=MIDDLE  ALT=\"t+=+3.894\"   DISABLED_style= \"max-width:90%; height:auto;\" > or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+-0.145 ALIGN=MIDDLE  ALT=\"t+=+-0.145\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "But <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t ALIGN=MIDDLE  ALT=\"t\"   DISABLED_style= \"max-width:90%; height:auto;\" > is time and hence cannot be negative.<BR>\n" );
document.write( "So the object will reach ground after <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=t+=+3.894 ALIGN=MIDDLE  ALT=\"t+=+3.894\"   DISABLED_style= \"max-width:90%; height:auto;\" > seconds. </SPAN>\n" );
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