A Population Model The population of the world in 2013
was 7.13 billion people and was growing at a rate of 1.1% per
year. Assuming that this growth rate continues, the model
P(t) = 7.1311.0112^(t-2013) represents the population P (in
billions of people) in year t.
(a) According to this model, when will the population of the
world be 10 billion people?
(b) According to this model, when will the population of the
world be 12.2 billion people?
