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If a rock is thrown upward on the planet Mars with a velocity of 15 m/s,...

If a rock is thrown upward on the planet Mars with a velocity of 15 m/s, its height (in meters) after t seconds is given by H = 15t − 1.86t^2

a) find the average velocity over the given time intervals: (i) [2, 3] (ii) [2, 2.5] (iii) [2, 2.1] (iv) [2, 2.01] (v) [2, 2.001]

b) Estimate the instantaneous velocity when t=2.

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