Question

The population of Kalona is currently 15,400 people. If the population decreases at an average rate of 325 people per year, how many years it will take for the population to fall to 775 people?

Answer 1

We can use the equation 15,400 - 325x = 775. This is because the current population is 15,400, and 325 people leave yearly. X represents the amount of years, and we need to solve x to figure out how many years for the population to fall to 775.

We need to isolate x. We can do that by subtracting 15,400 from both sides. This gives us -325x = -14,625. Next, we need to divide both sides by -325. This gives us x = 45.

We can plug 45 into x to check our answer. 15,400 - 325(45) = 775. 15,400 - 14,625 = 775.

It will take 45 years for the population to fall to 775 people.