document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=989069>Question 989069</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Baseballs from straight upward with an initial speed of 64 feet a second the number of feet S above the ground after T seconds is given by the equation s= -16 T squared +64t. when will the baseball be 48 feet above ?the ground when will he hit the ground? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #609503 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=609503\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> h=-16t^2+64t<BR>\n" );
document.write( "h=48<BR>\n" );
document.write( "Therefore, -16t^2+64t=48,<BR>\n" );
document.write( "16t^2-64t+48=0<BR>\n" );
document.write( "dividing by 16<BR>\n" );
document.write( "t^2-4t+3=0<BR>\n" );
document.write( "(t-3)(t-1)=0<BR>\n" );
document.write( "and t=1 and 3 seconds it will be 48 feet above the ground.<BR>\n" );
document.write( "It will hit the ground when -16t^2+64t=0, or t=4 seconds.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28300%2C200%2C-5%2C5%2C-5%2C75%2C-16x%5E2%2B64x%29 ALIGN=MIDDLE  ALT=\"graph%28300%2C200%2C-5%2C5%2C-5%2C75%2C-16x%5E2%2B64x%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );