Who trynna get this 60 points!.

Zero because it only has enough gas to go 16 hours. You cannot have a negative amount of gas so it has to be zero if it did not refill the gas.

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.