Question

if you traveled in a minivan for 8.5 hours at a rate of 80 mph then how many hours have you traveled

Answer 1

You have traveled 8.5 hours. The "rate of 80 mph" is useless information designed to confuse you. The problem says "you traveled in a minivan for 8.5 hours," which means that the answer to the question portion would simply be 8.5 hours.