Suppose that you fire a cannonball of mass 8 kg with an initial velocity of 120 m/s so that it will travel as?

Suppose that you fire a cannonball of mass 8 kg with an initial velocity of 120 m/s so that it will travel as far as possible, assuming that air resistance will slow down the cannonball by contributing a resistive force that is proportional to the ball’s instantaneous velocity with drag coefficient k = 0.0030. How much further can the cannonball travel if the same experiment is conducted in a vacuum?