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19 April, 12:38

You can model the population of a certain city between the years 1965 and 1995 by the radical function P (x) = 75,000 cubed root of (x-1940). Using this model, in what year was the population of that city 245,000?

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  1. 19 April, 14:02
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    P (x) = 75,000 * (x-1940) ^ (1/3)

    then the P = 245000 means

    245000 = 75,000 * (x-1940) ^ (1/3)

    (245000/75000) ^3 + 1940 = X

    X ≈ 1974
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