The pathway of a baseball hit can be modelled by the equation: h=- 2r2 - 12t+1.5 a. Determine the maximum height reached by the ball. (3 marks).
b. What was the height when the ball was first hit? (1 mark)
c. What was the height of the ball after 4 seconds?

please answer this quick pleas please please

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?