document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=259732>Question 259732</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A mortar shell is s feet above the ground after t seconds, where s = f(t) = -16t^2 + 512t + 64. Find the height of the shell 30 seconds after it is fired. (Simplify the answer as much as possible.)<BR>\n" );
document.write( " <BR>\n" );
document.write( "Could someone help me with this problem?\r<BR>\n" );
document.write( "\n" );
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 #191182 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=191182\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> plug in 30 for t<BR>\n" );
document.write( "s=-16t^2 + 512t + 64<BR>\n" );
document.write( "s = -16 (t^2-32 t-4)<BR>\n" );
document.write( "s = -16*(30^2-32(30)-4)\r<BR>\n" );
document.write( "\n" );
document.write( "s = -16(-2(30)-4)<BR>\n" );
document.write( "s=-16*(-64)<BR>\n" );
document.write( "s=1024 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );