Assume that 75 was the mean test score on an exam, with a standard deviation of 4 points. What percent had scores between 67 and 75? Use the % symbol in your answer.

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.