The population of Nilam doubles in size every 4 yr. In 1986, its population was 25,000. a) Find an exponential function of the form P(t) = Pon' that models Nilam's population after t years. b) Find the equivalent exponential model of the form P(t) Po e". c) What is Nilam's yearly percentage growth rate? d) Without using a calculator, find Nilam's population in 1994. e) How fast was Nilam's population changing in 1996?

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