document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=63915>Question 63915</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A toy rocket is fired from  a building. Its height at time t is given by the equation: h = -16t^2 + 396t + 100. When will it land on the ground below the bulding and what is its height after 10 seconds ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #44601 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=44601\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A toy rocket is fired from a building. Its height at time t is given by the equation: h(t) = -16t^2 + 396t + 100. When will it land on the ground below the bulding and what is its height after 10 seconds ?<BR>\n" );
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document.write( "When it hits the ground the height will be zero.<BR>\n" );
document.write( "Solve h(t)= -16t^2+396t+100 = 0<BR>\n" );
document.write( "t=[-396+-sqrt(396^2-4*-16*100)/(-32)<BR>\n" );
document.write( "t=-0.25 sec or t=25 sec<BR>\n" );
document.write( "Answer: t=25 sec<BR>\n" );
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document.write( "Height after 10 seconds = h(10)=2460 ft.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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