Population of the United States. The populationP of the United States in 1960 was 179,323,175. In 2010, the population was 308,745,538. The population of the United States can be estimated by the linear functionP given by P(x) = 2,578,409x + 151,116,864, where x is the number of years after 1950. Thus, P(20) gives the population in 1970.
a) Use this function to estimate the population in 1980 and in 2018.
b) When will the population be approximately 400,000,000?
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