Two trucks leave a warehouse at the same time. one travels due east at an average speed of 5050 miles per hour, and the other travels due west at an average speed of 5151 miles per hour. after how many hours will the two trucks be 707707 miles apart?

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.