document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=322956>Question 322956</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A balloonist throws a sandbag downward at 24 feet per second from an altitude of 720 feet. Its height (in feet) above the ground after t seconds is given by <BR>\n" );
document.write( "S(t) = 16t2 - 24t + 720.<BR>\n" );
document.write( "a)	Find S(1).\r<BR>\n" );
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document.write( "b) What is the height of the sandbag 2 seconds after it is<BR>\n" );
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document.write( "c) How long does it take for the sandbag to reach the<BR>\n" );
document.write( "ground? [On the ground, S(t )  = 0.] </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #231209 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=231209\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Garamond\" size=\"+2\">\r<BR>\n" );
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document.write( "You aren't going to have much luck using that function.  Up is positive and down is negative.  The acceleration due to gravity is ALWAYS down, unless you have invented some sort of anti-gravity machine. Hence:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ S(t)\ =\ -16t^2\ -\ 24t\ +\ 720\">\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ S(1)\ =\ -16(1)^2\ -\ 24(1)\ +\ 720\">\r<BR>\n" );
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document.write( "Which is the height of the object 1 second after it is thrown.  Hence the height 2 seconds after it was thrown is <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE S(2)\"> (you can do your own arithmetic in both cases.)\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ -16(1)^2\ -\ 24(1)\ +\ 720\ =\ 0\">\r<BR>\n" );
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document.write( "Factors:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE \ \ \ \ \ \ \ \ \ \ -8(2t\ +\ 15)(t\ -\ 6)\ =\ 0\">\r<BR>\n" );
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document.write( "Exclude the negative root.\r<BR>\n" );
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document.write( "John<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE e^{i\pi} + 1 = 0\"><BR>\n" );
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