Pencil Holder. A high school art teacher wants to buy material for her students' project. The project consists of making a pencil holder in the shape of a right cylinder including a lid producing a cylindrical container of volume 24 cm3. The cost of producing the top and bottom of the pencil holder is 48 cents per cm2 and the cost of producing the side of the cylinder is 25 cents per cmz. Hint: the area ofthe side is 272m. (3) The cost function is Note: Enter the cost function in terms of the radius r aniy. The symbol His in the Caicpad on the right in Symbols. CO) =