Me
answer both correctly for a brainliest and also a ! don't answer if you don't know it .

Let a the first term of the sequence and q the ratio of the sequence. So, our exponencial function is in the form: , where n is the number of the term of the sequence that we want find. So, as n is a natural number, a rasonable domain is the whole numbers. 

The method to find the female dormitory is 2-d=800