The fish population of Lake Oconee is decreasing at a rate of 3% per year. In 2014 there were about 1300 fish. Write an exponential decay function to model this situation. Then find the population in 2020.

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since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.