This exercise uses the population growth model. A certain species of bird was introduced in a certain county 25 years ago. Biologists observe that the population doubles every 10 years, and now the population is 13,000. (a) What was the initial size of the bird population? (Round your answer to the nearest whole number.) birds (b) Estimate the bird population 9 years from now. (Round your answer to the nearest whole number.) |birds (c) Sketch a graph of the bird population. (Assume t = 0 corresponds to the initial introduction.) n(t) n(t) 40 000 40 000 30 000 30 000 20 000 20 000 10 000 10 000 O 10 20 30 10 10 20 30 40 n (t) n(t) 40 000 40 000 30 000 30 000 20 000 20 000 10 000 10 000 10 20 30 40 10 20 Type here to search 30 40