Suppose that the position of a particle is given by s = f(t) = 7t³ + 4t+9. (a) Find the velocity at time t. v(t) = m S (b) Find the velocity at time t = 3 seconds. m S (c) Find the acceleration at time t. a(t) = m $2 (d) Find the acceleration at time t = 3 seconds. m

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