document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1146590>Question 1146590</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A ball is thrown from a height of 160 feet with an initial downward velocity of 12 ft/s. The bald height “h” (in feet) after “t” seconds is given by the following.<BR>\n" );
document.write( "H=160-12t-16t^2<BR>\n" );
document.write( "How long after the ball is thrown does it hit the ground?<BR>\n" );
document.write( "Round to nearest hundredth  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #767871 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=767871\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hits ground when H=0<BR>\n" );
document.write( "so -16t^2-12t+160=0<BR>\n" );
document.write( "divide by 4<BR>\n" );
document.write( "-4t^2-3t+40=0 <BR>\n" );
document.write( "4t^2+36-40=0<BR>\n" );
document.write( "t=(1/8)(-3 +/- sqrt (9+640); sqrt 649=25.48<BR>\n" );
document.write( "positive root only t=22.48/8=2.81 sec\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28300%2C300%2C-3%2C5%2C-50%2C200%2C-16x%5E2-12x%2B160%29 ALIGN=MIDDLE  ALT=\"graph%28300%2C300%2C-3%2C5%2C-50%2C200%2C-16x%5E2-12x%2B160%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );