My Math Forum height and feet???

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 April 27th, 2009, 04:59 PM #1 Newbie   Joined: Apr 2009 Posts: 16 Thanks: 1 height and feet??? The height y (in feet) of a ball thrown by a child is y=(?1/16x2)+(2x+5) where x is the horizontal distance in feet from the point at which the ball is thrown. (a) How high is the ball when it leaves the child's hand? (Hint: Find y when x=0.) feet =5 (b) What is the maximum height of the ball? feet =21 (c) How far from the child does the ball strike the ground? feet ???? cannot find C?/ I looked up it was 32 but not going through
 April 28th, 2009, 05:11 AM #2 Global Moderator   Joined: Dec 2006 Posts: 20,939 Thanks: 2210 Your answers are correct. For (c), put y = 0 and solve for x (using the quadratic formula); the answer you looked up is incorrect.

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# the height y (in feet) of a ball thrown by a child is where x is the horizontal distance in feet from the point at which the ball is thrown.

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