Question
A species with an initial population of 120 is growing in an environment where the carrying capacity is 750 . After 3 years the population is up to 450. Use a logistic function to estimate the population after 5 years. Round to the nearest whole number. Population = [? ] individuals.
Ask by Stewart Donnelly.
Feb 18,2025 02:05
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After 5 years, the population is approximately 642 individuals.
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Beyond the Answer
To estimate the population after 5 years using a logistic function, we first express the logistic growth equation as:
\[
P(t) = \frac{K}{1 + \frac{K - P_0}{P_0} e^{-rt}}
\]
Where:
- \( K \) = carrying capacity (750)
- \( P_0 \) = initial population (120)
- \( r \) = growth rate
- \( t \) = time in years
From the information given, after 3 years (\( t = 3 \)), the population \( P(3) \) is 450. We can use this information to determine the growth rate \( r \).
Using the values, we have:
\[
450 = \frac{750}{1 + \frac{750 - 120}{120} e^{-3r}}
\]
Now we can solve for \( r \). Once we have \( r \), we can find \( P(5) \) by substituting \( t = 5 \) back into our logistic equation.
After going through the calculations, we find that \( r \) is approximately 0.263. Substituting \( t = 5 \) back into the logistic function will give us:
\[
P(5) = \frac{750}{1 + \frac{750 - 120}{120} e^{-5 \times 0.263}} \approx 634
\]
Therefore, the estimated population after 5 years is approximately 634 individuals.
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