document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=270253>Question 270253</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Devin and Lee toss a baseball.  The height in feet of the baseball above the ground is given by h(t)= -16t^2+55t, where t represents the time in seconds after the ball is thrown.  How long is the ball in the air?  \r<BR>\n" );
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document.write( "Could someone please solve this problem.  I am very confused. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #198003 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=198003\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The height in feet of the baseball above the ground is given by h(t)= -16t^2+55t, where t represents the time in seconds after the ball is thrown. How long is the ball in the air? <BR>\n" );
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document.write( "h is the height of the ball.  Since it's thrown and caught at apx the same level above ground, that is the zero level.<BR>\n" );
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document.write( "Find when the height = zero.<BR>\n" );
document.write( "0 = -16t^2 + 55t<BR>\n" );
document.write( "t = 0 and t = 55/16<BR>\n" );
document.write( "t = 0 when it's tossed, and t = 55/16 seconds when it's back to the same level, so its flight time is 55/16 seconds.<BR>\n" );
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