If a rock is thrown upward on the planet Mars with a velocity of 13 m/s, its height in meters t seconds later is given by y = 13t – 1.8812. Find the average velocity over the time interval [2, 4]. a. 2.72 m/s b.-1.28 m/s c. 0.72 m/s d. 1.72 m/s e. 3.72 m/s

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