document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=56231>Question 56231</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0534403654/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> The path traveled by a golf ball hit with a 9-iron can be modeled with the quadratic function, y = -0.042x(squared) + 5x, where x is the distance in yards from the point it was hite and y is the height of the golf ball in feet. Assume that the ground is level.\r<BR>\n" );
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document.write( "a. Find the maximum height reached by the ball.<BR>\n" );
document.write( "b. How far from where it was hit does the ball 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 #38137 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=38137\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The path traveled by a golf ball hit with a 9-iron can be modeled with the quadratic function, y = -0.042x(squared) + 5x, where x is the distance in yards from the point it was hit and y is the height of the golf ball in feet. Assume that the ground is level. <BR>\n" );
document.write( "a. Find the maximum height reached by the ball.<BR>\n" );
document.write( "a=-0.42, b=5<BR>\n" );
document.write( "max at x=-b/2a=-5/(2(-0.42))=5.95238....<BR>\n" );
document.write( "y=14.881 ft.<BR>\n" );
document.write( "Comment: It seems highly unlikely that this is the <BR>\n" );
document.write( "height.  The model is erroneous.\r<BR>\n" );
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document.write( "b. How far from where it was hit does the ball hit the ground?<BR>\n" );
document.write( "height = 0 when the ball hits the ground.<BR>\n" );
document.write( "0=-0.42x^2+5x<BR>\n" );
document.write( "x(-0.42x+5)=0<BR>\n" );
document.write( "x=0 or x=11.95 yrds <BR>\n" );
document.write( "Comment: Another nonsensicle answer based on the nonsensicle<BR>\n" );
document.write( "model you have posted.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
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