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(23) A population of animals has a low population of 700 on January 1st and a high of 900 on July 1st is best modelled

(23) A population of animals has a low population of 700 on January 1st and a high of 900 on July 1st is best modelled by a cosine wave. Write a formula for the population P(t) where t is measured in months from the start of the year

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