document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=203749>Question 203749</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If an object is thrown upward with an initial velocity of 64 ft/sec, its height after t sec is given by h = 64t -16t^2. Find the number of seconds the object is in the air before it 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 #153741 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=153741\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If an object is thrown upward with an initial velocity of 64 ft/sec, its height after t sec is given by h = 64t -16t^2. Find the number of seconds the object is in the air before it hits the ground. <BR>\n" );
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document.write( "It's at ground level when h = 0.<BR>\n" );
document.write( "h = 64t - 16t^2 = 0<BR>\n" );
document.write( "t = 0 seconds<BR>\n" );
document.write( "t = 4 seconds<BR>\n" );
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document.write( "It's at ground level at 0 seconds, and returns to ground level after 4 seconds.<BR>\n" );
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