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Q: Due to acid rain, the percentage of lakes in Scandinavia that lost their population of brown trout increased dramatically between 1940 and 1975. Based on

Due to acid rain, the percentage of lakes in Scandinavia that lost their population of brown trout increased dramatically between 1940 and 1975. Based on a sample of 2850 lakes, this percentage can be approximated by the following piecewise-linear function.image



(a) Determine the percentage of lakes that lost brown trout by 1947 and by 1972. 


(b) Sketch a graph of f. 


(c) Is f a continuous function on its domain?

f(x) = 1940) + 7 + 18 +18 (x-1960) 1960) if 1940 x < 1960 if 1960 x 1975

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