An animal traveling at 3mm/h east increased his velocity to 5 mm/h east in one hour. What was the animal's acceleration?

An animal traveling at 3mm/h east increased his velocity to 5 mm/h east in one hour. What was the animal's acceleration?

Acceleration = velocity/time

velocity=5mm = 0.005m

time = 1 hour = 60 seconds

A = 0.005/60

Acceleration = 0.000083m/s square