document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=136159>Question 136159</A>: <I><SPAN STYLE=\"word-break: break-all;\"> please, help mw with this\r<BR>\n" );
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document.write( " A ball is thrown upward at a velocity of 12 feet per second from a height that is 40 feet above the ground. The height A (in feet) of the ball at time t (in seconds), after it is thrown, can be found by the formula h = -12t2 + 14t + 40   <BR>\n" );
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document.write( "Find the time, in seconds, when the ball is again 40 feet above the ground.<BR>\n" );
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document.write( " Thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #99711 by </B><A HREF=/tutors/aboutme.mpl?userid=vleith><B>vleith(2983)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=vleith><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=99711\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h+=+-12t2+%2B+14t+%2B+40++ ALIGN=MIDDLE  ALT=\"h+=+-12t2+%2B+14t+%2B+40++\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "You are asked to find the time(s) when the ball is 40 feet above the ground.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h+=+-12t2+%2B+14t+%2B+40+ ALIGN=MIDDLE  ALT=\"h+=+-12t2+%2B+14t+%2B+40+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=40=+-12t2+%2B+14t+%2B+40++ ALIGN=MIDDLE  ALT=\"40=+-12t2+%2B+14t+%2B+40++\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+0+=+-12t%5E2+%2B+14t ALIGN=MIDDLE  ALT=\"+0+=+-12t%5E2+%2B+14t\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0+=+-2t%286t+-+7%29+ ALIGN=MIDDLE  ALT=\"0+=+-2t%286t+-+7%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "the value is 0, if either or both terms on the right are 0.\r<BR>\n" );
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document.write( "So, 0 = -2t --> t = 0<BR>\n" );
document.write( "0 = (6t-7) --> t = 7/6  \r<BR>\n" );
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document.write( "The ball is at 40 feet when you throw it, and again 7/6 seconds later\r<BR>\n" );
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document.write( "Check your answer\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h+=+-12%287%2F6%29%5E2+%2B+14%287%2F6%29+%2B+40+ ALIGN=MIDDLE  ALT=\"h+=+-12%287%2F6%29%5E2+%2B+14%287%2F6%29+%2B+40+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h+=+-16.333+%2B+16.333+%2B+40+ ALIGN=MIDDLE  ALT=\"h+=+-16.333+%2B+16.333+%2B+40+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h+=+40+ ALIGN=MIDDLE  ALT=\"h+=+40+\"   DISABLED_style= \"max-width:90%; height:auto;\" > check </SPAN>\n" );
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