Effect of Immigration on Population Growth Suppose a country's population at any time t grows in accordance with the rule P pr dt where P denotes the population at any time , k is a positive constant reflecting the natural growth rate of the population, and I is a constant giving the (constant) rate of immigration into th population of the country at time t = 0 is P, find an expression for the population at any time t. pP= X Need Help? I Readit")