document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=411177>Question 411177</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A ball is thrown across a playing field. Its path is given by the equation below, where x is the distance the ball has traveled horizontally, and y is its height above ground level, both measured in feet. <BR>\n" );
document.write( "y = -0.005x2 + x + 9 \r<BR>\n" );
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document.write( "A) What is the maximum height attained by the ball?<BR>\n" );
document.write( "B) How far has it traveled horizontally when it hits the ground? Round your answer to the nearest foot. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #289040 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=289040\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y = -0.005x^2 + x + 9 <BR>\n" );
document.write( "A) What is the maximum height attained by the ball?<BR>\n" );
document.write( "Max occurs when x = -b/2a = -1/(2*-0.005) = 100 seconds<BR>\n" );
document.write( "Max height is f(100) = -0.005(100)^2+100+9 = 59<BR>\n" );
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document.write( "B) How far has it traveled horizontally when it hits the ground? Round your answer to the nearest foot.<BR>\n" );
document.write( "It started at f(0) = 9 ft and will be back on the ground at f(x) = 0 ft.<BR>\n" );
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document.write( "Solve -0.005x^2+x+9 = 0<BR>\n" );
document.write( "Solve for \"x\" using the Quadratic Formula.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "=============<BR>\n" );
document.write( " </SPAN>\n" );
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