The radius of a circle is 4 miles. What is the circle's circumference?
r=4 mi
Use 3.14 for .

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.