document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=214252>Question 214252</A>: <I><SPAN STYLE=\"word-break: break-all;\"> golf ball is hit at ground level. The ball is<BR>\n" );
document.write( "observed to reach its maximum height above<BR>\n" );
document.write( "ground level 6.9 s after being hit. 1.1 s after<BR>\n" );
document.write( "reaching this maximum height, the ball is<BR>\n" );
document.write( "observed to barely clear a fence that is 357 ft<BR>\n" );
document.write( "from where it was hit.<BR>\n" );
document.write( "The acceleration of gravity is 32 ft/s2 .<BR>\n" );
document.write( "How high is the fence? Answer in units of<BR>\n" );
document.write( "ft.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #162087 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=162087\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> golf ball is hit at ground level. The ball is<BR>\n" );
document.write( "observed to reach its maximum height above<BR>\n" );
document.write( "ground level 6.9 s after being hit. 1.1 s after<BR>\n" );
document.write( "reaching this maximum height, the ball is<BR>\n" );
document.write( "observed to barely clear a fence that is 357 ft<BR>\n" );
document.write( "from where it was hit.<BR>\n" );
document.write( "The acceleration of gravity is 32 ft/s2 .<BR>\n" );
document.write( "How high is the fence? Answer in units of<BR>\n" );
document.write( "ft.<BR>\n" );
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document.write( "h(t) = -16t^2 + vt (v = initial vertical speed)<BR>\n" );
document.write( "v = 32*6.9 = 220.8 ft/sec<BR>\n" );
document.write( "h(t) = -16t^2 + 220.8t<BR>\n" );
document.write( "t = 6.9 + 1.1 seconds<BR>\n" );
document.write( "h(8) = -16*64 + 220.8*8 = -1024 + 1766.4<BR>\n" );
document.write( "h = 742.4 feet<BR>\n" );
document.write( "That's a tall fence, I suspect a number isn't right.  13.8 seconds is a LONG flight time for a golf ball.<BR>\n" );
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document.write( "The distance to the fence is not relevant. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );