document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=232290>Question 232290</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Story problem:<BR>\n" );
document.write( "A tennis ball is hit upward with a velocity of 48 feet per second.  Ignoring the height of the tennis player, how long does it take for the ball to fall to the ground?\r<BR>\n" );
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document.write( "Formula:<BR>\n" );
document.write( "h(t)= v0t-16t^2\r<BR>\n" );
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document.write( "h(t) is height of an object (feet)<BR>\n" );
document.write( "v0 is object's initial velocity (feet per second)<BR>\n" );
document.write( "t is time (seconds)\r<BR>\n" );
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document.write( "so far i have 3 seconds but that is just one of the roots of the quadratic, not time.<BR>\n" );
document.write( "??????\r<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 #171724 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=171724\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A tennis ball is hit upward with a velocity of 48 feet per second. Ignoring the height of the tennis player, how long does it take for the ball to fall to the ground? <BR>\n" );
document.write( "Formula:<BR>\n" );
document.write( "h(t)= v0t-16t^2 <BR>\n" );
document.write( "h(t) is height of an object (feet)<BR>\n" );
document.write( "v0 is object's initial velocity (feet per second)<BR>\n" );
document.write( "t is time (seconds) <BR>\n" );
document.write( "so far i have 3 seconds but that is just one of the roots of the quadratic, not time.<BR>\n" );
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document.write( "When it hits the ground its height is zero.<BR>\n" );
document.write( "Solve for t: 48t - 16t^2 = 0<BR>\n" );
document.write( "16t(3-t) = 0<BR>\n" );
document.write( "t = 0 seconds or t=3 seconds<BR>\n" );
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document.write( "Explanation:<BR>\n" );
document.write( "At t=0 seconds the ball is on the ground and about to be thrown upward.<BR>\n" );
document.write( "At t=3 seconds the ball is again on the ground having fallen from its<BR>\n" );
document.write( "highest point.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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