Suppose that a particle moves according to the law of motion st² 12t+24, (A) Find the velocity at time t. v(t) = (B) What is the velocity after 3 seconds? - t≥ 0. Velocity after 3 seconds = (C) Find all values of ₺ for which the particle is at rest. (If there are no such values, enter 0. If there are more than o value, list them separated by commas.)

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