4. [-/0.1 Points] DETAILS MY NOTES ASK YOUR TEA A closed rectangular box is to have a square base and a volume of 50 fts. Letting x denote the length of one side of the base, find a function fin the variable x giving the surface area of the box. f ( x ) = What is the domain of this function? 5. [-/0.1 Points] DETAILS MY NOTES ASK YOUR TEA For its beef stew, Betty Moore Company uses aluminum containers that have the form of right circular cylinders. Letting / denote the radius of a container if it has a capacity of 25 in. ", find a function fin the variable / giving the surface area of the container. f(r ) = What is the domain of this function