document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=949274>Question 949274</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the equation h(t)=-16t^2+864t models the path of a rocket shot into the air. after how many seconds does the rocket 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 #579505 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=579505\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the equation h(t)=-16t^2+864t models the path of a rocket shot into the air. after how many seconds does the rocket hit the ground? <BR>\n" );
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document.write( "Height is zero when the rocket hits the ground.<BR>\n" );
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document.write( "Solve:<BR>\n" );
document.write( "-16t^2 + 864t = 0<BR>\n" );
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document.write( "Factor:<BR>\n" );
document.write( "-16t(t - 54) = 0<BR>\n" );
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document.write( "Positive solution:<BR>\n" );
document.write( "t = 54 seconds<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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