Help im very confused.

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.