document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=909873>Question 909873</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A ball is thrown upward with an initial velocity of 48 feet per second from a height of 864 feet. Its height h in feet after t seconds is given by h(t) =-16t^2+48t+864 after how long will the ball reach 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 #552084 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=552084\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> h(t) =-16t^2+48t+864 <BR>\n" );
document.write( "0 = -16t^2+48t+864 <BR>\n" );
document.write( "0 = -16(x-3/2)^2 + 36 + 864<BR>\n" );
document.write( "16(x-3/2)^2 = 900<BR>\n" );
document.write( "x = 3/2 + 15/2= 9sec<BR>\n" );
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document.write( " </SPAN>\n" );
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