Sibal started with $500 in a bank account that does not earn interest. in the middle of every month, she withdraws 15 of the account balance. which recursive function rule models sibal’s balance at the end of each month?
an=4/5⋅an−1 and a1=500
an=500⋅an−1 and a1=1/5
an=1/5⋅an−1 and a1=500
an=500⋅an−1 and a1=4/5

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.