document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=298640>Question 298640</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rock falls from a tower that is 400 ft high. AS it is falling, its height is given by formula h = 400 - 16t^2. How many seconds will it takes for the rock to hit the ground (h = 0)? Show your work. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #214785 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=214785\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> since h =0 when it touches the ground\r<BR>\n" );
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document.write( "400-16t^2=0\r<BR>\n" );
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document.write( "16t^2=400\r<BR>\n" );
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document.write( "t^2=400/16\r<BR>\n" );
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document.write( "t^2= 25\r<BR>\n" );
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document.write( "t=5 seconds\r<BR>\n" );
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