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calculus

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A program in Senegal has been reducing infant mortality at a rate
of 11.1% per year. How long will it take for infant mortality
to be reduced by 33%?

  • calculus - ,

    solve
    .67 = 1(.889)^n
    ln .67 = ln (.889^n)
    ln .67 = n ln (.889)
    n = ln .67/ln .889 = 3.4 years

  • calculus - ,

    thank you!

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