document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=571016>Question 571016</A>: <I><SPAN STYLE=\"word-break: break-all;\"> my homework question reads: <BR>\n" );
document.write( "an object is thrown upward from the top of a 256ft tower at a velocity of 96ft/sec. Find the height after 3 seconds. <BR>\n" );
document.write( "I know I need to use the quadratic equation, but I don't know what to do next. \r<BR>\n" );
document.write( "\n" );
document.write( "3t=-16t^2+96t+256<BR>\n" );
document.write( "16t^2-93t-256=0 \r<BR>\n" );
document.write( "\n" );
document.write( "Thanks for your help!   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #367899 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=367899\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> According to Physics, the height as a function of time in seconds should be<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h%28t%29=-16t%5E2%2B96t%2B256 ALIGN=MIDDLE  ALT=\"h%28t%29=-16t%5E2%2B96t%2B256\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "After 3 seconds, the object's height is<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h%283%29=-16%2A3%5E2%2B96%2A3%2B256 ALIGN=MIDDLE  ALT=\"h%283%29=-16%2A3%5E2%2B96%2A3%2B256\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h%283%29=-16%2A9%2B288%2B256 ALIGN=MIDDLE  ALT=\"h%283%29=-16%2A9%2B288%2B256\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h%283%29=-144%2B288%2B256 ALIGN=MIDDLE  ALT=\"h%283%29=-144%2B288%2B256\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h%283%29=400 ALIGN=MIDDLE  ALT=\"h%283%29=400\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The quadratic function <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h%28t%29 ALIGN=MIDDLE  ALT=\"h%28t%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > has a maximum and its graph (h versus t) is a parabola.<BR>\n" );
document.write( "To figure out when it reaches its highest altitude, find the axis of symmetry of the parabola:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=-288%2F%282%2A%28-16%29%29 ALIGN=MIDDLE  ALT=\"x=-288%2F%282%2A%28-16%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > --> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=9 ALIGN=MIDDLE  ALT=\"x=9\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "So the object reaches its maximum height at 9 seconds.<BR>\n" );
document.write( "That height is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h%289%29=-16%2A9%5E2%2B96%2A9%2B256 ALIGN=MIDDLE  ALT=\"h%289%29=-16%2A9%5E2%2B96%2A9%2B256\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "To find out when it hits the ground (<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h%28t%29=0 ALIGN=MIDDLE  ALT=\"h%28t%29=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >), you solve the quadratic equation<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=-16t%5E2%2B96t%2B256=0 ALIGN=MIDDLE  ALT=\"-16t%5E2%2B96t%2B256=0\"   DISABLED_style= \"max-width:90%; height:auto;\" > or the equivalent <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=16t%5E2-96t-256=0 ALIGN=MIDDLE  ALT=\"16t%5E2-96t-256=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );