1. ## find the formula

A population has size 8000 at time with in years. (a) If the population decreases by 100 people per year, find a formula for the population, at time
(b) If the population decreases by 15% per year, find a formula for the population, at time

(a) I think it is 8000(-1.0100)^x

and b is $8000(1-\frac{15}{100})^x = 8000(0.85^x)$.