document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=885591>Question 885591</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rock is thrown upward with an initial velocity of 68 fps  from the top of a building that is 148 feet tall. The height h(ft) at any time t (sec) can be determined by the equation h(t) = -16t2 + 68 t  +148. After how many seconds will the rock 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 #535272 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=535272\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> h(t) = -16t2 + 68 t  +148<BR>\n" );
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document.write( "Find t when h(t) = 0<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h%28t%29+=+-16t%5E2+%2B+68t++%2B148+=+0 ALIGN=MIDDLE  ALT=\"h%28t%29+=+-16t%5E2+%2B+68t++%2B148+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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