Because of an insufficient oxygen supply, the trout population in a lake is dying. The population's rate of change can be modeled by dp/dt = −130e−t/30 where t is the time in days. When t = 0, the population is 3900. (a) Find a model for the population. P(t) = (b) What is the population after 13 days? (Round your answer to the nearest integer.) fish

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