Question

The bird population on an island is declining at a rate of 2.2% per year. The population was 3500 in the year 2009.

Which answer is the best prediction of the population in the year 2014?

A 2730
B 3062
C 3132
D 3423

Answer 1

Hey so the answer would be c

Answer 2

The population is multiplied by 100% -2.2% = 97.8% each year. After 5 years, the population will have been multiplied by this value 5 times, so will be ...

... 3500×0.978⁵ ≈ 3132

The appropriate choice is ...

... C. 3132