document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=299665>Question 299665</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rock falls from a tower that is 208 feet high. As it is falling, its height is given by the formula h= 208-16t^2. how many seconds will it take for the rock to hit the ground (h=0)? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #215250 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=215250\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> h= 208-16t^2<BR>\n" );
document.write( "Since<BR>\n" );
document.write( "h is height<BR>\n" );
document.write( "t is time (secs)<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Set h=0 and solve for t:<BR>\n" );
document.write( "h= 208-16t^2<BR>\n" );
document.write( "0= 208-16t^2<BR>\n" );
document.write( "16t^2 = 208<BR>\n" );
document.write( "t^2 = 208/16<BR>\n" );
document.write( "t^2 = 13<BR>\n" );
document.write( "t = sqrt(13)<BR>\n" );
document.write( "t = 3.61 seconds\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );