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anonymous

  • 5 years ago

Is my answer correct? Write an exponential function to model this situation: a population of 420 animals decreases at an annual rate of 21%. Then predict the value of the function after 5 years (to the nearest whole number). My answer: f(x) = 420(1.21)^x; 2541 animals

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  1. anonymous
    • 5 years ago
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    420(1.21)^5 = 2541

  2. Hero
    • 5 years ago
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    The function is decreasing so that means that the value in parentheses would have to be between 0 and 1

  3. anonymous
    • 5 years ago
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    I misread the question, I thought it said it was increasing.

  4. anonymous
    • 5 years ago
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    Would it be, f(x) = 420(0.79)x; 129 animals?

  5. anonymous
    • 5 years ago
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    \[P(t)=420\times (.79)^t\] \[P(5)=420\times (.79)^5=129\] rounded

  6. anonymous
    • 5 years ago
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    yes, 129

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