document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=809982>Question 809982</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boy steps off a 17.6 foot high diving board with no initial vertical velocity, obeying the law <BR>\n" );
document.write( "h=-16t^2+vt+s <BR>\n" );
document.write( "where v is the velocity, t is in seconds, and so is the initial height. <BR>\n" );
document.write( "How long does it take him to hit the water? <BR>\n" );
document.write( "Answer in units of sec \r<BR>\n" );
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document.write( "If, instead, he springs o&#64256; the diving board <BR>\n" );
document.write( "with an initial vertical velocity of 6.7 ft/s, <BR>\n" );
document.write( "how long does it take him to hit the water? <BR>\n" );
document.write( "Answer in units of sec \r<BR>\n" );
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document.write( "How do you go about doing this problem ? I'm pretty confused. Thanks for any help. Much is appreciated.<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 #487988 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=487988\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A boy steps off a 17.6 foot high diving board with no initial vertical velocity, obeying the law<BR>\n" );
document.write( "h=-16t^2+vt+s<BR>\n" );
document.write( "where v is the velocity, t is in seconds, and s is the initial height.<BR>\n" );
document.write( "How long does it take him to hit the water?<BR>\n" );
document.write( "If he just steps off the diving board there is no upward velocity so the equations is just:<BR>\n" );
document.write( "-16t^2 + 17.6 = 0<BR>\n" );
document.write( "-16t^2 = -17.6<BR>\n" );
document.write( "t^2 = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-17.6%29%2F%28-16%29 ALIGN=MIDDLE  ALT=\"%28-17.6%29%2F%28-16%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "t^2 = +1.1<BR>\n" );
document.write( "t = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%281.1%29 ALIGN=MIDDLE  ALT=\"sqrt%281.1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "t = 1.05 sec to hit the water<BR>\n" );
document.write( ":<BR>\n" );
document.write( "If, instead, he springs o&#64256; the diving board<BR>\n" );
document.write( "with an initial vertical velocity of 6.7 ft/s,<BR>\n" );
document.write( "how long does it take him to hit the water? Now the equation is:<BR>\n" );
document.write( "-16t^2 + 6.7s + 17.5 = 0<BR>\n" );
document.write( "Use the quadratic formua to find t<BR>\n" );
document.write( "I got a positive solution of<BR>\n" );
document.write( "t = 1.28 seconds<BR>\n" );
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