A Rocket Is Launched from the Origin with an Acceleration

Multiple Choice

A rocket is launched from the origin with an acceleration of 20.0 m/s² at an angle of 30.0 degrees above the horizontal. The launch acceleration lasts for 2.00 seconds at which time the fuel is exhausted. The rocket then falls with an acceleration of 9.80 m/s² downward. What is the time it takes to reach maximum height?

A) 3.22 s
B) 3.87 s
C) 4.04 s
D) 4.75 s
E) 5.12 s