document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=95519>Question 95519</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please, please help me, I have been working on this problem for 1 1/2 hours and cannot solve it.  God Bless!  Lin\r<BR>\n" );
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document.write( "An archery enthusiast was testing his new bow. He shot an arrow straight up from the top of a building 48 feet high with an initial velocity of 32 feet per second. The height of the arrow (h measured in feet) after t seconds in flight is described by the equation <BR>\n" );
document.write( "h = 48 + 32t - 16t^2. \r<BR>\n" );
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document.write( "Determine the number of seconds after the arrow is shot that it will strike the ground.\r<BR>\n" );
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document.write( "t = ??? seconds<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #69515 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=69515\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> When it strikes the ground the height = zero.<BR>\n" );
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document.write( " 48 + 32t - 16t^2 = 0<BR>\n" );
document.write( "16t^2-32t-48 = 0<BR>\n" );
document.write( "Divide thru by 16 to get:<BR>\n" );
document.write( "t^2-2t-3=0<BR>\n" );
document.write( "Factor to get:<BR>\n" );
document.write( "(t-3)(t+1)<BR>\n" );
document.write( "Positive answer:<BR>\n" );
document.write( "t = 3 seconds<BR>\n" );
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document.write( "The arrow will be on the ground 3 seconds after it was shot up.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
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