Out of a group of 50,000 births, the number of people, f(x), surviving to age x is
Chapter 0, Problem 86(choose chapter or problem)
Out of a group of 50,000 births, the number of people, f(x), surviving to age x is modeled by the function f(x) = 50002100 - x. To what age will 20,000 people in the group survive?
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