1/8 divided by 3 plz help right now

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?

Determine which postulate or theorem can be used to prove that lmn =nmo