A population grows exponentially, increasing at a rate of 1.5% annually. After years, the initial population, grows to be P.(1.015)^t

What is the rate of population increase per decade, and how can it be found by transforming the expression P(1.015) ?

10.15 %, because P0(1.015)t = P0(1.015/10)10t = P0(0.01015)10t

15 %, because P0(1.015)t = P0(1.015 x 10)t/10 = P0(10.15)t/10

16.05 %, because P0(1.015)t = P0(1.01510 )t/10 = P0(1.1605)t/10

0.15 %, because P0(1.015)t = P0(1.01510 )t/10 = P0(1.0015)t/10