document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=367485>Question 367485</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If a ball is thrown upward 32 ft per second from a 40 ft. tall building,the height of the ball can be measured by S=40+32t-16t^2, where t is the number of seconds after the ball is thrown.  Find the t and S coordinates of the vortex of this quadratic equation.  \r<BR>\n" );
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document.write( "I am not quite sure how to solve this.  I was originally factoring it out.<BR>\n" );
document.write( "0=-16t^2+32t+40<BR>\n" );
document.write( "0=-4(4t^2-8t-10)<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 #261958 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=261958\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the vertex is on the axis of symmetry ___ t = -b / (2a)\r<BR>\n" );
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document.write( "find t and then substitute to find s </SPAN>\n" );
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