The surface area , in square units, of a cylinder with a volume of 18 cubic units is a function of its radius , in units, where . What is the surface area of a cylinder with a volume of 18 cubic units and a radius of 3 units?

Han finds an expression for that gives the surface area, in square inches, of any cylindrical can with a specific fixed volume, in terms of its radius , in inches. This is the graph Han gets if he allows  to take on any value between -1 and 5.

1. What would be a more appropriate domain for Han to use instead?
2. What is the approximate minimum surface area for the can?

The graph of a polynomial function is shown. Is the degree of the polynomial even or odd? Explain your reasoning.

The polynomial function has known factors of and .

1. Rewrite as the product of linear factors.
2. Draw a rough sketch of the graph of the function.

Which polynomial has as a factor?