The difference of two numbers is 40. Find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.

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.