The number of walruses in a certain bay is increasing exponentially. On April 1, 1979, the population was 323. On April 16, 1978, the population was 298.
(a) How many months ago (before April 1, 1979) was the population 200? (Assume that 1 month = 30.0 days.)
(b) What would the population have been on August 16, 1974?

1. In this problem, you will make the easiest progress if you work in months. Thus the population increased from 298 to 323 in 11.5 months from April 16, 1978 to April 1, 1979. With this information, you should be able to calculate the growth constant, 'k'.
2. The growth constant is:

 

 
 
 

A. -0.0070 month
B. 0.0070 month
C. -0.010 month
D. 0.010 month

In part (a) the answer is

A. 8.42 mo
B. 9.59 mo
C. 10.36 mo
D. 12.01 mo

Solution
 

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