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**Sculthorp** I've come to the conclusion that canadian and american math is taught differently. If you know how we do it here in Canada plz explain this question step by step.

The path of a thrown baseball can be modelled by the function h=-0.004d^2+0.14d+2 where h is the height of the ball, in meters, and d is the horizontal distance of the ball from the player, in meters.

a) What is the maximum height reached by the ball?

b) What is the horizontal distance of the ball from the player when it reaches its maximum height?