document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1186903>Question 1186903</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 4. A video tracking device recorded the height h, in metres, of a baseball after it was hit into the air. The data<BR>\n" );
document.write( "collected can be modelled by the quadratic relation h =  -  3(t  -  3) 2 + 18, where t is the time in seconds after the ball was<BR>\n" );
document.write( "hit.<BR>\n" );
document.write( "a. Sketch a graph that represents the height of the baseball.<BR>\n" );
document.write( "b. What was the maximum height reached by the baseball?<BR>\n" );
document.write( "c. When did the baseball reach its maximum height?<BR>\n" );
document.write( "d. At what time(s) was the baseball at a height of 10 m?<BR>\n" );
document.write( "e. Approximately when did the baseball hit the ground? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #817877 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52824)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=817877\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .\r<BR>\n" );
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document.write( "Consider starting moment &nbsp;t = 0, &nbsp;when the baseball was hit.\r<BR>\n" );
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document.write( "Its height at this time moment is, &nbsp;according to the formula\r<BR>\n" );
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document.write( "    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;h = -3*(0-3)^2 + 18 = -3*9 + 18 = -27 + 18 = - 9 meters.\r<BR>\n" );
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document.write( "Negative height ? &nbsp;&nbsp;Don't you think it is quite nonsensical ?\r<BR>\n" );
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document.write( " </SPAN>\n" );
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