document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=265826>Question 265826</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A ball is thrown upward with an initial velocity of 32 ft/s from a height 768 ft. h=-16t^2+32t+768. After how many seconds will the ball reach 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 #195389 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=195389\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A ball is thrown upward with an initial velocity of 32 ft/s from a height 768 ft. h=-16t^2+32t+768. <BR>\n" );
document.write( "After how many seconds will the ball reach the ground?<BR>\n" );
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document.write( "The height is zero when the ball hits the ground.<BR>\n" );
document.write( "Solve -16t^2 + 32t + 768 = 0 for a positive \"t\" value.<BR>\n" );
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document.write( "-16(t^2 - 2t - 48) = 0<BR>\n" );
document.write( "t^2 -2t - 48 = 0<BR>\n" );
document.write( "(t-8)(t+6) = 0<BR>\n" );
document.write( "Positive solution:<BR>\n" );
document.write( "t = 8 seconds<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
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