Use the information from the article to answer the question. Asteroids and Comets
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Which statements apply to comets? Check all that apply.

formed of ice, rock, and dust
contain a liquid core
develop tails near the Sun
orbit gas giants like Jupiter and Neptune

If a rock is thrown upward on the planet mars with a velocity of 10 mys, its height in meters t seconds later is given by y − 10t 2 1.86t 2 . (a) find the average velocity over the given time intervals: (i) [1, 2] (ii) [1, 1.5] (iii) [1, 1.1] (iv) [1, 1.01] (v) [1, 1.001] (b) estimate the instantaneous velocity when t − 1.