document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=311345>Question 311345</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Need to find the equations for x in this word problem. Thanks!\r<BR>\n" );
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document.write( "A projectile is launched vertically upward with an initial speed of 256 ft/sec.  The equation for its vertical distance from the ground is h = 256t – 16t^2, where t is time in seconds.  Find the projectile’s maximum height and the total time that it is in the air. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #222686 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=222686\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Remember that an object in upward flight is slowed by gravity at a rate of -32 ft/s/s...<BR>\n" );
document.write( "Thus if an object has an initial upward velocity of 256 ft/s, it reaches a speed of zero after 8 seconds. (256 - 8(32) = 0)<BR>\n" );
document.write( "Now, knowing this, we can plug t = 8 into the height function and get<BR>\n" );
document.write( "h = 256t – 16t^2<BR>\n" );
document.write( "h = 256(8) - 16(8^2)<BR>\n" );
document.write( "h = 2048 - 1024<BR>\n" );
document.write( "h = 1024 feet<BR>\n" );
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