document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=861461>Question 861461</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Bob hits a cricket ball into the air. The height(in feet) of the ball at time t seconds is given by h(t)= -10.5t^2+66.3t+6. Find the maximum height the ball reaches and the time in seconds when that maximum height occurs. I'm not looking for the answer but HOW to solve this as I can't find the formula. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #519046 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=519046\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  h(t)= -10.5t^2+66.3t+6 is the formula.<BR>\n" );
document.write( "Find the vertex<BR>\n" );
document.write( "-b/2a=-66.3/-21=t\r<BR>\n" );
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document.write( "vertex | (3.15714, 110.659)<BR>\n" );
document.write( "or set the first derivative to 0<BR>\n" );
document.write( "0 = 66.3-21t to find t  </SPAN>\n" );
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