Answer:
The velocity at t = 6 is of -166 units of velocity.
Explanation:
Velocity function:
The velocity function is the integral of the acceleration function.
We have that:
The acceleration function is:

So the velocity function is:

In which K is the constant of integration, which is v(0).
v(0)=50
This means that:

What is the velocity at t=6?

The velocity at t = 6 is of -166 units of velocity.