document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=838361>Question 838361</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The equation is h(t)= -16t^2+50t+4. (h for feet and t for seconds). The question is When will the ball be 40 feet above the ground. I plugged 40 into h(t), subtracted it and inserted it into the other side. I factored but got t=9/8 and t=2. I do not think I am supposed to have two positive numbers. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #505025 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=505025\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The equation is h(t)= -16t^2+50t+4. (h for feet and t for seconds). The question is When will the ball be 40 feet above the ground. I plugged 40 into h(t), subtracted it and inserted it into the other side. I factored but got t=9/8 and t=2. I do not think I am supposed to have two positive numbers.<BR>\n" );
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document.write( "Yes you are.<BR>\n" );
document.write( "The ball starts at a height of 4 ft.<BR>\n" );
document.write( "It rises at a rate of 50 ft/sec<BR>\n" );
document.write( "It takes 9/8  = 1 1/8 seconds to reach a height of 40 ft because<BR>\n" );
document.write( "gravity is pulling it down at 16 ft/(sec^2).<BR>\n" );
document.write( "It continues to rise, then descends to a height of 40 ft.<BR>\n" );
document.write( "after being in flight 2 seconds.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "==================== </SPAN>\n" );
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