document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=617046>Question 617046</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The function below shows the height, in feet, above the ground of a model rocket t seconds after it is launched off a platform.\r<BR>\n" );
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document.write( "h(t)= -16t^2+128t+5\r<BR>\n" );
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document.write( "How high off the ground does the rocket start?<BR>\n" );
document.write( "When does the rocket reach its highest point?<BR>\n" );
document.write( "How high is that?<BR>\n" );
document.write( "How long does the rocket stay in the air? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #388094 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=388094\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The function below shows the height, in feet, above the ground of a model rocket t seconds after it is launched off a platform. <BR>\n" );
document.write( "h(t)= -16t^2+128t+5<BR>\n" );
document.write( ".. <BR>\n" );
document.write( "How high off the ground does the rocket start?<BR>\n" );
document.write( "5 ft, when t=0<BR>\n" );
document.write( "..<BR>\n" );
document.write( "When does the rocket reach its highest point?<BR>\n" );
document.write( "complete the square:<BR>\n" );
document.write( "h(t)=-16(t^2-8t+16)+5+256<BR>\n" );
document.write( "h(t)=-16(t-4)^2+261<BR>\n" );
document.write( "rocket reach its highest point after 4sec<BR>\n" );
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document.write( "How high is that? 261 ft </SPAN>\n" );
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