Question

. Approximately 25 Brown Tree Snakes were introduced to Guam around 1950. By 1965 exponential population growth led to a population size of about 40,000.

3. What is r? A) 0 B. 0.22 C. 0.49 D. 1.64 E) 7.37

4. Convert this value of r to an estimate of l. A) 0 B. 0.22 C. 0.49 D. 1.64 E) 7.37

Answer 1

3. The correct option is (c) 0.49

4. The correct option is (c) 0.49.

Explanation -

The growth rate (%) can be calculated by using the formula: - Na = No ert cohere, Na population at time it No = "Initial population ra growth rate at a time I. This formula can be rearranged as: 8= ln (Nt. NO at a 2.303 log NI Here Nu ? 4000 No = 25 t = 15 years F given data I on question get So, putting these values , we 8 = 2.303 log 40000 - 2.303 X 2.204 is 50.49194 ~0.49 ③ Hence the correct option is (6) 0.49

4 Here, also the correct option is (0) 0.49

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