Simplify: (d - 3)(d + 9)

a) d^2 + 6
b) d^2 - 27
c) d^2 - 12d - 27
d) d^2 + 6d - 27

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.

Determine domain and range, largest open interval, and intervals which function is continuous.

What is the the greatest common factor ?