The world needs a new source of energy, an unspillable source.

physics, not sure how to do this problem?

In 1998, NASA launched Deep Space 1 (DS-1), a spacecraft that successfully flew by the asteroid named 1992 KD (which orbits the sun millions of miles from the earth). The propulsion system of DS-1 worked by ejecting high-speed argon ions out the rear of the engine. The engine slowly increased the velocity is DS-1 by about +9.0 m/s per day.

a) How much time (in days) would it take to increase the velocity of DS-1 by +2700 m/s?

b) What was the acceleration of DS-1 (in m/s^2)

Answers are suppose to be:
a) 3.0 x 10^ 2 days
b) +1.04 x 10^ -4 m/s^2