The number of rabbits in a forest varies with time. During the period of 1980 to 1990 the number is given approximately by the formula 5000+ 5000 sin(2nt/5) where t is the number of years after 1980. (a) Sketch on graph paper the population during 1980-1990. (b) What years was the population greatest (in increasing order)? (c) What years was the population lowest (in increasing order)? (d) How quickly was the population changing at the start of 1985? Was it increasing or decreasing? What are the units of your answer (write out all words)? I

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