# If an arrow is shot straight upward on the moon with a velocity of 61 m/s, its height (in meters) aftert seconds is given by S(t) = 61t -0.83t2. What is the velocity of the arrow (in m/s) after 9 seconds? After how many seconds will the arrow hit the moon? With what velocity (in m/s) will the arrow hit the moon?

Question

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