The population of Nilam doubles in size every 6yr. In 1986​, its population was 20,000.   ​a) Find an exponential function of the form P(t)=P0nt/T that models​ Nilam's population after t years. ​b) Find the equivalent exponential model of the form P(t)=P0ert. ​c) What is​ Nilam's yearly percentage growth​ rate?

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