## Question

###### 18. If Fx)arccotdt, find F' (x).19. A ball is thrown vertically upward from the height of 9 ft with an initial velocity of 36ft/s. Use a(t) ~32ft/s? to find velocity and height functions_ b) How long will it take the ball to rise to its maximum height? c) What is the maximum height?

18. If Fx) arccot dt, find F' (x). 19. A ball is thrown vertically upward from the height of 9 ft with an initial velocity of 36ft/s. Use a(t) ~32ft/s? to find velocity and height functions_ b) How long will it take the ball to rise to its maximum height? c) What is the maximum height?

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