The population of a community is known to increase at a rate proportional to the number of people present at time t (in years). In 4 years, the population has increased to 4,000 from an initial population of 2,000. What is the formula for the population P(t) at time t?
Answer: The population of a community is know to increase at a rate proportional to the number of people present at time t. If an initial population's P0 has doubled in 5 year's.