document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=43575>Question 43575</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A baseball is hit into the air so that the number of feet s above the ground after t seconds is given by s=-16t^2+96t.  How long will it take to first reach a height of 144 feet above the ground?  Thank you 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 #28571 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=28571\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A baseball is hit into the air so that the number of feet s above the ground after t seconds is given by s=-16t^2+96t. How long will it take to first reach a height of 144 feet above the ground? \r<BR>\n" );
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document.write( "144=-16t^2+96t<BR>\n" );
document.write( "-16t^2+96t-144=0<BR>\n" );
document.write( "16t^2-96t+144=0<BR>\n" );
document.write( "16(t^2-6t+9)=0<BR>\n" );
document.write( "16(t-3)(t-3)=0<BR>\n" );
document.write( "t=3 seconds is the only time the ball reaches a height of 144 ft.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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