EXPLAIN PLEASE!! The function f(x) = -(x - 20)(x - 100) represents a company's monthly profit as a function of x, the number of purchase orders received. Which number of purchase orders will generate the greatest profit?

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters .

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.

If sin(x) = 0 and cos(x) = 1, what is tan(x)?