document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=479546>Question 479546</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A ball is thrown vertically upward at a velocity of 15 feet per second from a bridge that is 55 feet above the level of the water. The height h, in feet, of the ball above the water at the time t in seconds after it is thrown is <BR>\n" );
document.write( "h = 16t^2 + 20t - 48<BR>\n" );
document.write( "Find the time when the ball strikes 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 #328597 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=328597\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> h = 16t^2 + 20t - 48<BR>\n" );
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document.write( "If the initial upward speed is 15 ft/sec and the bridge is 55 ft above the water, the eqn would be<BR>\n" );
document.write( "h(t) = -16t^2 + 15t + 55<BR>\n" );
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document.write( "The equation you gave shows increasing altitude with time.  It starts at -48 feet and never comes down.<BR>\n" );
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