Question

The population of a certain rare animal species increases exponentially

according to the function P(t) = Poert, where Po is the initial
population, t is time measured in years, and r is a constant. If the
population increases from 20 to 80 in 4 years, what will the population be
in another 2 years? Simplify your answer as much as possible?

Answer 1

160

Explanation:

It doubled twice in 4 years, so it will double again in the next two years.

No need to solve the equation for r.