Population Growth The size of the population of the United States essentially depends on

Chapter 0, Problem I

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Population Growth The size of the population of the United States essentially depends on its current population, the birth and death rates of the population, and immigration. Let b represent the birth rate of the U.S. population and d represent its death rate. Then represents the growth rate of the population, where r varies from year to year. The U.S. population after n years can be modeled using the recursive function pn = 11 + r2pn-1 + I where I represents net immigration into the United States.