document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1133275>Question 1133275</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Benjamin threw a rock straight up from a cliff that was <BR>\n" );
document.write( "24ft above the water. If the height of the rock​ h, in​ feet, after t seconds is given by the equation h equals negative 16 t squared plus 20 t plus 2 h=−16t2+20t+24​, how long will it take for the rock to hit the​ water? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #750450 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=750450\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The equation's \"24\" is the height above the water.  Solve this for h=0, water level<BR>\n" );
document.write( "-16t^2+20t+24=0<BR>\n" );
document.write( "-4t^2+5t+6=0 or 4t^2-5t-6=0<BR>\n" );
document.write( "(4t+3)(t-2)=0<BR>\n" );
document.write( "t=2 only positive root.<BR>\n" );
document.write( "2 seconds ANSWER<BR>\n" );
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