A population of wolves on an island starts at 5 if the population doubles every 10 years, what will

A population of wolves on an island starts at 5 if the population doubles every 10 years, what will be the population in 90 years?

If the population doubles every 10 years, we have 90/10 = 9 doubling periods.

Our population function P(t) is where t is the doubling period
P(t) = 5(2^t)

The problem asks for P(9):
P(9) = 5(2^9)
P(9) = 5(512)
P(9) = 2,560