document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=267038>Question 267038</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A bullet is shot into the air at an initial rate of 900 feet per second from a height of 9 feet. How high does the bullet travel? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #196062 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=196062\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Using 32/ft/sec/sec as Earth's gravity:<BR>\n" );
document.write( "h(t) = -16t^2 + 900t + 9  (t in seconds, h in feet)<BR>\n" );
document.write( "The function is a parabola, the vertex is the max height<BR>\n" );
document.write( "Vertex at t = -b/2a = -900/-32 = 225/8 seconds<BR>\n" );
document.write( "h(225/8) = 12665.25 feet<BR>\n" );
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