Population growth Suppose p(t) = -1.7t3 + 72t2 + 7200t +80,000 is the population of a city t years after 1950.a. Determine the average rate of growth of the city from 1950 to2000.b. What was the rate of growth of the city in 1990?

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Exponential Growth Model

The relation that represents an exponential function is: