document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=60980>Question 60980</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0495012661/algebrahomeworkh>college algebra</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> I always have trouble with these distance/height ones.  Can anyone help me out?Thanks for any efforts.\r<BR>\n" );
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document.write( "When the soccer golie kicks a ball, the height (in feet) of the ball after t seconds is given by:<BR>\n" );
document.write( " h(t)=-16t^2 + 64t.  \r<BR>\n" );
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document.write( "How long before the ball hits 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 #41903 by </B><A HREF=/tutors/aboutme.mpl?userid=Nate><B>Nate(3500)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Nate><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=41903\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> When the ball hits the ground, the ball will be at zero feet in height.<BR>\n" );
document.write( "0 = -16t^2 + 64t<BR>\n" );
document.write( "0 = t^2 - 4t<BR>\n" );
document.write( "4 = (t - 2)^2<BR>\n" );
document.write( "+- 2 = t - 2<BR>\n" );
document.write( "2 +- 2 = t<BR>\n" );
document.write( "t = 0 and t = 4<BR>\n" );
document.write( "After four seconds, the ball will hit the ground respecting your formula. </SPAN>\n" );
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