document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=87708>Question 87708</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The equation h=-16t^2+112t gives the height of an arrow, shot upward from the ground with an initial velocity of 112ft/s, where t is the time after the arrow leaves the ground. Find the time it takes for the arrow to reach a height of 180 ft. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #63624 by </B><A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><B>tutorcecilia(2152)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><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=tutorcecilia><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=63624\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> h=-16t^2+112t \r<BR>\n" );
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document.write( "180=-16t^2+112t [Let (h) = 180]<BR>\n" );
document.write( "0 = -16t^2+112t-180 [set the equation equal to zero]<BR>\n" );
document.write( "Use the quadratic formula to factor<BR>\n" );
document.write( "x=2.5 seconds ascending or x = 4.5 seconds descending<BR>\n" );
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