An orange bumper car (mass=450kg) going 4.5 m/s hits a yellow car that is traveling at 3.7 m/s from behind, causing the orange car to slow down to 3.6 m/s and the yellow car to speed up to 4.4 m/s. Wh

An orange bumper car (mass=450kg) going 4.5 m/s hits a yellow car that is traveling at 3.7 m/s from behind, causing the orange car to slow down to 3.6 m/s and the yellow car to speed up to 4.4 m/s. What is the mass of the the yellow car?