Question 1021030
The height y (in feet) of a ball thrown by a child is 
y=−16x^2+2x+5
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That's the height as a function of the time in seconds.
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I doubt you entered the problem correctly.
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 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? ________ feet
5 feet
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 (b) What is the maximum height of the ball? _______feet

 (c) How far from the child does the ball strike the ground? ________feet

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The "________ feet" serves no purpose and is irritating.  Why do you think we need that?