Question

The world population in 2013 was estimated to be 7.1 billion people, and it is increasing by about 1.1% per year. Assume that this percentage growth rate remains constant through 2025.

Answer 1

i think:
from 2013 to 2025 are 12 years
so the percent will increase: 1.1 x 12= 13.2%
population in 2025: (100%+13.2%)x 7.1= 8.0372 billion people