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The position y, in meters, of a particle moving along a straight line, at any time t seconds is given by y(t) = -10t

The position y, in meters, of a particle moving along a straight line, at any time t seconds is given by y(t) = -10t -2t. a. Find the average velocity of the particle between t = 2 seconds and t = 4 seconds. b. Find the velocity of the particle at time t = 2 seconds.

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