Suppose that the position of a particle is given by s = f(t) = 3t3 + 2t + 9. (a) Find the velocity at time t. т v(t) = (b) Find the velocity at time t = 3 seconds. т. (c) Find the acceleration at time t. m a(t) = s2 (d) Find the acceleration at time t 3 seconds. т s2

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