Your highlighted question says this:
" If the population of West Lake is about 11,849 in 2017, the population in 2018 will be about _______. Rounded to the nearest person, the population will be about _____.
Look at the function that is very well explained at the beginning of the question:
P(2018) ==11,849 x [1 + 2.8/100] ==11,849 x 1.028==12,180.772 ==12,181 - rounded to the nearest person - will be the population of West Lake in 2018.
Note: 2.8% means ==2.8 / 100 ==0.028
