Cost for a can: This is a continuation o. Suppose now that we use different materials in making different parts of the can. The material for the side of the can costs $0.10 per square inch, and the...

Cost for a can: This is a continuation o. Suppose now that we use different materials in making different parts of the can. The material for the side of the can costs $0.10 per square inch, and the material for the top and bottom costs $0.05 per square inch.

a. Use a formula to express the cost C, in dollars, of the material for the can as a function of the radius r.

b. What radius should you use to make the least expensive can?