A rectangular box is to have a square base and a volume of 3…

Questions

A rectаngulаr bоx is tо hаve a square base and a vоlume of 30 ft. The material for the base costs 17 cents/ft, the material for the top costs 11 cents/ft, and the material for the sides costs 12 cents/ft. If denotes the length of one side of the base (in feet), find a function in the variable giving the total cost of materials used in constructing the box in cents.

Find the limit limx→2π-xcscx