Please help me get ungrounded so please help me with some work thx

Someone . me. compound probability

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

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?