document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1167951>Question 1167951</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The height y (in feet) of a ball thrown by a child is y= −1/14x² + 4x + 5 where x is the horizontal distance in feet from the point at which the ball is thrown.\r<BR>\n" );
document.write( "\n" );
document.write( "(a) How high is the ball when it leaves the child's hand? \r<BR>\n" );
document.write( "\n" );
document.write( "  ? feet\r<BR>\n" );
document.write( "\n" );
document.write( "(b) What is the maximum height of the ball? \r<BR>\n" );
document.write( "\n" );
document.write( "  ? feet\r<BR>\n" );
document.write( "\n" );
document.write( "(c) How far from the child does the ball strike the ground? Round your answers to the nearest 0.01. \r<BR>\n" );
document.write( "\n" );
document.write( "  ? feet\r<BR>\n" );
document.write( "\n" );
document.write( "I need help on this one!!! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #792630 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=792630\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> It is 5 feet high, the constant in the equation.<BR>\n" );
document.write( "-<BR>\n" );
document.write( "vertex is at x=-b/2a or -4/-1/7 or 28<BR>\n" );
document.write( "when x=28 then y=-56+112+5=61 ft.<BR>\n" );
document.write( "-<BR>\n" );
document.write( "it strikes the ground when y=0<BR>\n" );
document.write( "rewrite quadratic as -x^2+56x+70=0 or x^2-56x-70=0<BR>\n" );
document.write( "x=(1/2)(56+/- sqrt (3136+280)) sqrt term=58.45<BR>\n" );
document.write( "x=57.22 ft.\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28300%2C300%2C-10%2C60%2C-5%2C70%2C%28-1%2F14%29x%5E2%2B4x%2B5%29 ALIGN=MIDDLE  ALT=\"graph%28300%2C300%2C-10%2C60%2C-5%2C70%2C%28-1%2F14%29x%5E2%2B4x%2B5%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );