document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=681777>Question 681777</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If an object is projected vertically upward from an altitude of a feet with an initial velocity of v ft/sec, then its distance s(t) above the ground after t seconds is<BR>\n" );
document.write( "s(t) = &#8722;16t2 + vt + a.<BR>\n" );
document.write( "If s(1) = 99 and s(4) = 129, what are v and a?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #422783 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=422783\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> s(t) = &#8722;16t2 + vt + a.<BR>\n" );
document.write( "If s(1) = 99 and s(4) = 129, what are v and a? \r<BR>\n" );
document.write( "\n" );
document.write( "99= -16(1)^2+v(1)+a<BR>\n" );
document.write( "99=v+a-16<BR>\n" );
document.write( "v+a=99+16<BR>\n" );
document.write( "v+a=115..........(1)\r<BR>\n" );
document.write( "\n" );
document.write( "129= -16(4^2)+4v+a\r<BR>\n" );
document.write( "\n" );
document.write( "129=-256+4v+a\r<BR>\n" );
document.write( "\n" );
document.write( "4v+a=129+256<BR>\n" );
document.write( "4v+a=386...........(2)\r<BR>\n" );
document.write( "\n" );
document.write( "Solve (1) & (2) \r<BR>\n" );
document.write( "\n" );
document.write( "subtract (2) from (1)<BR>\n" );
document.write( "-3v=-276<BR>\n" );
document.write( "v=92<BR>\n" );
document.write( "Plug v in equation above to get a </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );