Mathematics

Question

The population of a certain animal species you are studying decreases at a rate of 3.5% per year. Only 80 of the animals in the habitat remain after 3 years of conducting your research. What was the initial amount of animals?

2 Answer

  • The function:
    f ( x ) = x * 0.965^t
    where x is the initial amount and t is the number of the years
    80 = x * 0.965^3
    80 = x  *  0.89632
    x = 80 : 0.89632 ≈ 89
    Answer:
    The initial amount of animals was 89.
  • Answer:

    The formula setup would look like 80(1-.035)^3. You would subtract .035 from 1 to get .965, then you would multiply by the exponent of 3. .095 to the third power is 0.898632125. then you would multiply 0.898632125 to 80 to get 71.89057, which there would be 71 animals left since this is a real life question.

    the answer is 71

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