document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=517015>Question 517015</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A ball is dropped from the top of a 576 ft. building.  Its height h(t) at time t seconds is given by h(t)=-16t^2+576.<BR>\n" );
document.write( "Find the height of the ball after 2 seconds:<BR>\n" );
document.write( "I know this is 512 ft.\r<BR>\n" );
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document.write( "The next part...Determine how long it takes the ball to hit the ground:<BR>\n" );
document.write( "I came up with 36 seconds but it was wrong and I can't figure it out. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #344599 by </B><A HREF=/tutors/aboutme.mpl?userid=jessica43><B>jessica43(140)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jessica43><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=344599\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> To solve this problem, you need to solve for t when h = 0.  So:<BR>\n" );
document.write( "h = -16t^2 + 576<BR>\n" );
document.write( "0 = -16t^2 + 576 (subtract 576 from each side)<BR>\n" );
document.write( "-576 = -16t^2  (divide each side by -16)<BR>\n" );
document.write( "36 = t^2  (take the square root of each side)<BR>\n" );
document.write( "6 = t<BR>\n" );
document.write( "So it will take the ball 6 secs to hit the ground.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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