document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=306986>Question 306986</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The height h (in feet) of a kangaroo's jump can be modeled by h=-16t^2+18t where t is the time (in seconds) since the kangaroo jumped off of the ground. Find the zeros.<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 #219690 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=219690\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Set h to zero and solve for t:<BR>\n" );
document.write( "h=-16t^2+18t<BR>\n" );
document.write( "0=-16t^2+18t<BR>\n" );
document.write( "0=-8t^2+9t<BR>\n" );
document.write( "0=t(-8t+9)<BR>\n" );
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document.write( "t = {0, 9/8)<BR>\n" );
document.write( "That is h (height)is zero at times:<BR>\n" );
document.write( "0 secs (at the beginning)<BR>\n" );
document.write( "and again at<BR>\n" );
document.write( "9/8 secs (or 1.125 secs)  </SPAN>\n" );
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