Each day 1/2 the money that is in the bank vault is removed. no money is added to the vault. which of the following moddeles the situation.

I found the answer is

-exponential decay function

Name m the money at the beggining of the first day. This table shows the money at the end of every day, after half the money has been removed

Day money

1 m/2 = m/2^1

2 m/4 = m/2^2

3 m/8 = m/2^3

4 m/16 = m/2^4

...

n m/2^n

The model is m/2^n, where n is numbers of days elapsed and m is the money at the end of that day (after half on the money has been removed).