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Calc

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The U.S. population is approximated by the function
P(t) =
556
1 + 3.72e−0.5t
where P(t) is measured in millions of people and t is measured in 30-year intervals, with t = 0 corresponding to 1930. What is the expected population of the United States in 2020 (t = 3)? (Round your answer to the nearest whole number.)
million people

  • Calc - ,

    Just evaluate P(3), (sub in 3 wherever you see a t )

    btw, is this supposed to be a fraction?

  • Calc - ,

    Not a fraction, so 331.7 thank you!!

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