document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1138655>Question 1138655</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Jack hit a golf ball from the ground and its movement follows the equation h(t)=-16t^2+84t, where t is the time in seconds, and h(t) is the height of the ball at a given time t.\r<BR>\n" );
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document.write( "Find the time that it took the golf ball to hit the ground again correct to two decimal places.\r<BR>\n" );
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document.write( "                 seconds\r<BR>\n" );
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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 #756462 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=756462\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> When it hits the ground, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+h%28t%29+=+0+ ALIGN=MIDDLE  ALT=\"+h%28t%29+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+0+=+-16t%5E2+%2B+84t+ ALIGN=MIDDLE  ALT=\"+0+=+-16t%5E2+%2B+84t+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t%2A%28+-16t+%2B+84+%29+=+0+ ALIGN=MIDDLE  ALT=\"+t%2A%28+-16t+%2B+84+%29+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+16t+=+84+ ALIGN=MIDDLE  ALT=\"+16t+=+84+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+t+=+5.25+ ALIGN=MIDDLE  ALT=\"+t+=+5.25+\"   DISABLED_style= \"max-width:90%; height:auto;\" > sec<BR>\n" );
document.write( "--------------------------<BR>\n" );
document.write( "check:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+-16%2A5.25%5E2+%2B+84%2A5.25+=+0+ ALIGN=MIDDLE  ALT=\"+-16%2A5.25%5E2+%2B+84%2A5.25+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+-16%2A27.5625+%2B+441+=+0+ ALIGN=MIDDLE  ALT=\"+-16%2A27.5625+%2B+441+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+-441+%2B+441+=+0+ ALIGN=MIDDLE  ALT=\"+-441+%2B+441+=+0+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "OK </SPAN>\n" );
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