document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=541823>Question 541823</A>: <I><SPAN STYLE=\"word-break: break-all;\"> THe height in feet a ball is t seconds after being throan in the air is given by H(t)=-16t^2+64t+5\r<BR>\n" );
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document.write( "A)How long did it take the ball to reach its maximum height above the ground\r<BR>\n" );
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document.write( "B)What was the maximum height above the ground the ball reached </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #354298 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=354298\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> THe height in feet a ball is t seconds after being throan in the air is given by H(t)=-16t^2+64t+5\r<BR>\n" );
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document.write( "A)How long did it take the ball to reach its maximum height above the ground<BR>\n" );
document.write( "Vertex of parabola is the max:<BR>\n" );
document.write( "t = -b/(2a)<BR>\n" );
document.write( "t = -64/(2(-16))<BR>\n" );
document.write( "t = -64/(-32)<BR>\n" );
document.write( "t = 2 seconds<BR>\n" );
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document.write( "B)What was the maximum height above the ground the ball reached<BR>\n" );
document.write( "plug t=2 into:<BR>\n" );
document.write( "H(t)=-16t^2+64t+5<BR>\n" );
document.write( "H(2)=-16(2)^2+64(2)+5<BR>\n" );
document.write( "H(2)=-16(4)+128+5<BR>\n" );
document.write( "H(2)=-64+128+5<BR>\n" );
document.write( "H(2)= 69 feet<BR>\n" );
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