The longest scheduled bus route is greyhound's "supercruiser" miami-to-san francisco route, a distance of 3240 miles. If the distance is covered in about 82 hours, what is the average speed of the bus?

You will have to divide 2 numbers, it is between 30 and 40 MPH's

Well, as a teacher I can not tell you the answer, but you need to know the equation to find speed. That equation is (which I am sure you have in your notes) is s = d/t.
s=speed
d=distance
t=time