Question: The position function of a particular particle is given by f(t) = -t + 4t + 8. Assume that it is defined for t.

The position function of a particular particle is given by f(t) = -t + 4t + 8. Assume that it is defined for t. (a) What is the velocity function of the particle? f'(t) = (b) What is the velocity of the particle when t = 9? f'(9) = (c) What is the speed of the particle when t = 9? |f'(9)|

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