I really need the help?

Can someone me do math because i am having a breakdown rn because i don’t get it

Find the distance from the theater to the library. leave your answer in simplest radical form if necessary. 12 √12 74 √74

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?