Given APQR and ASTU, what is mZQ ?

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.

Can someone explain to me how to do

Agallon of apple juice cost $7 a pack of eight 4.23oz box of apple juice $2.39 which is a better deal