document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=84295>Question 84295</A>: <I><SPAN STYLE=\"word-break: break-all;\"> josefina hit a tennis ball into the air with an initial upward velocity of 16 feet per second. The height, h in feet of the ball above the ground can be modeled by  h=-16t^2+16t+3, where t is the time in seconds after josefina hit the tennis ball. Find the time it takes the ball to reach 7 feet above the ground.\r<BR>\n" );
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document.write( "THANK YOU </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #60695 by </B><A HREF=/tutors/aboutme.mpl?userid=vertciel><B>vertciel(183)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=vertciel><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=60695\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> h= -16t^2 + 16t + 3\r<BR>\n" );
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document.write( "You want to find t, but you know the height (7 feet) so just substitute that in.\r<BR>\n" );
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document.write( "7 = -16t^2 + 16t + 3\r<BR>\n" );
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document.write( "-16t^2 + 16t + 3 = 7 <-- Rewrote it to make it look nicer.\r<BR>\n" );
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document.write( "-16t^2 + 16t - 4 = 0\r<BR>\n" );
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document.write( "This is a quadratic equation. Try to solve it yourself but if you need more help, please write back.\r<BR>\n" );
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