Far in space, where gravity is negligible, a 455 kg rocket traveling at 85.0 m/s fires its engines. The figure shows the thrust force as a function…

Far in space, where gravity is negligible, a 455 kg rocket traveling at 85.0 m/s fires its engines. The figure shows the thrust force as a function of time. The mass lost by the rocket during these 30 s is negligible.What is the maximum speed of the rocket? (Impulse is 15000 N*s)