An airplane with a mass of 1.40 x 10^4 kg tows a glider with a mass of 0.500 x 10^4 kg. If the acceleration of the aircraft is 2.5 m/s^2, what is the thrust provided by the airplane's propellers? (Disregard friction)
a) 4.75 x 10^4 N
b) 2.50 x 10^4 N
c) 18.3 x 10^4 N
d) 3.65 x 10^4 N