One painter can paint a house in 12 hours. The other painter can paint a house in 8 hours. Write an equation in terms of time, t, for the amount of time it would take both painters to paint the house together.

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.