13is 26% of what number

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

You have 138.72 in your saving account u take out 45.23 and 18.00 you deposit 75.85 into your account

Ian is in training for a national hot dog eating contest on the 4th of july. on his first day of training, he eats 4 hot dogs. each day, he plans to eat 110% of the number of hot dogs he ate the previous day. write an explicit formula that could be used to find the number of hot dogs ian will eat on any particular day.