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Find two rational expressions that have the difference of 2-n/n-4

Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.

Identify the number 127 as a rational or irrational. explain