Question

The displacement (in meters) of a particle moving in a straight line is given by 3t^3 where t is measured in seconds. Find the average velocity of the particle over the time interval [8,11].

Answer 1

From what I can see:
f(t)=3t^3
f(8)=1536
f(11)=3993
Which gives a distance traveled of 2457 meters.
That would average to:
2457/3 = 819 m/s