suppose P(t), the population in millions of a country in a year t, is defined by the formula: P(t)=125+.2t?
a) what is the initial population of the country?
b) what is the country's growth rate?
c) what is the country's expected population 5 years from now (i.e t-5)?

Question

suppose P(t), the population in millions of a country in a year t, is defined by the formula:      P(t)=125+.2t?
a) what is the initial population of the country?
b) what is the country's growth rate?
c) what is the country's expected population 5 years from now (i.e t-5)?

anonymous · Answer

are you sure this is a formula for population growth?

anonymous · Answer

initial population is 
$$P(0)=125$$

anonymous · Answer

growth rate is .2 per year

anonymous · Answer

in 5 years get 
$$P(5)=125+.2\times5=126$$