document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=631027>Question 631027</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If u could please help me set up the equation i am coming out with 2448 seconds which seems to large. The problem is a baseball is thrown striaght upward with an initial speed of 48ft/sec the number of feet s(t) above the ground after (t) seconds is given by s(t)=-16tsquare+48t when will it hitthe ground? The teacher said not to find the vertex thank you very much  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #397284 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=397284\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given:<BR>\n" );
document.write( "s(t)=-16t^2+48t <BR>\n" );
document.write( ".<BR>\n" );
document.write( "S(t) is zero when it hits the ground -- so, set s(t) to zero and solve for t:<BR>\n" );
document.write( "0 = -16t^2+48t <BR>\n" );
document.write( "0 = 16t^2-48t <BR>\n" );
document.write( "0 = t^2-3t <BR>\n" );
document.write( "0 = t(t-3)<BR>\n" );
document.write( ".<BR>\n" );
document.write( "t = {0, 3}<BR>\n" );
document.write( "throw out the 0 (beginning of throw) leaving:<BR>\n" );
document.write( "t = 3 seconds<BR>\n" );
document.write( " <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );