Can you solve this?

Question

As a town gets​ smaller, the population of its high school decreases by 5​% each year. The senior class has 250

students now. In how many years will it have about 100 ​students? Write an equation.

Answer 1

The equation for the students is S = S₀(1-.15)^y or S = S₀(.85)^y

where S = Students after time y in years, S₀ is the starting number of students which is 250 now,

Set S = 100, S₀ = 250 and solve for y. The answer is 5.64 years.