document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=124439>Question 124439</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The equation h=-16t^2-32t+320<BR>\n" );
document.write( "Give the height of a ball, thrown donward from top of a 320ft.  Building with an initial velocity of 32ft/s.  Find the time it takes for the ball to reach a height of 64ft. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #91189 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=91189\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> H=-16T^2-32T+320<BR>\n" );
document.write( "64=-16T^2-32T+320<BR>\n" );
document.write( "-16T^2-32T+320-64=0<BR>\n" );
document.write( "-16T^2-32T+256=0<BR>\n" );
document.write( "-16(T^2+2T-16)=0<BR>\n" );
document.write( "USING THE QUADRATIC EQUATION:<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ ALIGN=MIDDLE  ALT=\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "X=(-2+-SQRT[2^2-4*1*-16])/2*1<BR>\n" );
document.write( "X=(-2+-SQRT[4+64])/2<BR>\n" );
document.write( "X=(-2+-SQRT68)/2<BR>\n" );
document.write( "X=(-2+-8.246)/2<BR>\n" );
document.write( "X=(-2+8.246)/2<BR>\n" );
document.write( "X=6.246/2<BR>\n" );
document.write( "X=3.123 SECONDS. ANSWER FOR THE TIME FOR THE BALL TO BE @ 64 FT FROM THE GROUND.\r<BR>\n" );
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