Question 252813
Assuming the population increase for the first year is 4% and the increase for second year is an ADDITIONAL 4% then:

x = population number

After 1 year population = x*1.04
After 2 years population = x*1.04*1.04*1.04 = x*1.04^3 = x*1.124864

So after 2 years the population has increases by (1-1.124864)*100 percent or 12.48% to 2 dp.