A Satellite,initially at Rest in Deep Space,separates into Two Pieces,which

Multiple Choice

A satellite,initially at rest in deep space,separates into two pieces,which move away from each other.One piece has a rest mass of 190 kg and moves away with a speed 0.280c,and the second piece moves in the opposite direction with a speed 0.600c.What is the rest mass of the second piece?

A) 88.7 kg
B) 79.6 kg
C) 73.9 kg
D) 68.8 kg
E) 52.7 kg