document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=468712>Question 468712</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A flare is fired directly upward into the air from a boat that is experiencing engine problems. The height of the flare (in feet) above the water, t seconds after being fired, is given by the formula h = -16t2 + 160t + 6. If the flare is designed to explode when it reaches its highest point, at what height will this occur?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #321585 by </B><A HREF=/tutors/aboutme.mpl?userid=jorel1380><B>jorel1380(3719)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jorel1380><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=jorel1380><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=321585\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Its highest point is midway through its' flight, which is given by:<BR>\n" );
document.write( "1/2(-16t2+160t)=0<BR>\n" );
document.write( "-8t2+80t=0<BR>\n" );
document.write( "80t=8t2<BR>\n" );
document.write( "10t=t2<BR>\n" );
document.write( "t=10<BR>\n" );
document.write( "The highest point is reached after 10 seconds.. </SPAN>\n" );
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