document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=115971>Question 115971</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help with a word problem. An arrow is fired into the air with an initial velocity of 64 feet per second. The height in feet of the arrow t seconds after it was shot into the air is given by the function h(x)=-16t^2+64t. Find the maximum height of the arrow. I thought I was to use the equations -b/2(a) in which I came up with 2 feet. is this correct? If not please tell me how to get the answer. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #84410 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=84410\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> :<BR>\n" );
document.write( "You used the axis of symmetry formula and got t = 2 seconds which is the time that<BR>\n" );
document.write( "maximum height occurred<BR>\n" );
document.write( ":<BR>\n" );
document.write( "To find max height, substitute 2 for t in the equation.<BR>\n" );
document.write( "h(2) = -16(2^2) + 64(2)<BR>\n" );
document.write( "h(2) = -64 + 128<BR>\n" );
document.write( "h(2) = 64 ft is the max height of the arrow </SPAN>\n" );
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