document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=951227>Question 951227</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A professional stunt diver jumps off a tower. His height above the ground is given by the expression h(t)=-5t^2+20. How long does it take for the diver to reach 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 #581031 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=581031\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A professional stunt diver jumps off a tower.<BR>\n" );
document.write( " His height above the ground is given by the expression h(t)=-5t^2+20.<BR>\n" );
document.write( " How long does it take for the diver to reach the water? <BR>\n" );
document.write( ":<BR>\n" );
document.write( "When he strikes the water his height is 0, therefore<BR>\n" );
document.write( "-5t^2 + 20t = 0<BR>\n" );
document.write( "simplify, divide by -5t<BR>\n" );
document.write( "t - 4 = 0<BR>\n" );
document.write( "t = 4 seconds </SPAN>\n" );
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