The population of a region is growing exponentially. there were 30 million people in 1980 (when t=0) and 80 million people in 1990.
(a) find an exponential model, p(t), for the population (in millions of people) at any time t, in years after 1980. note: keep at least 4 decimal places in your answer.
(b) what population do you predict for the year 2000? note: round to one decimal place. predicted population in the year 2000
(c) what is the doubling time? note: round to one decimal place. doubling time =