Consider a wire 4 ft long cut into two pieces. One piece forms a circle with radius r and the other forms a square of side x. Choose x to maximize the sum of their areas.

Can any one me with the answers to these questions asap?

Due to a packaging error, 4 cans labeled diet soda were accidentally filled with regular soda and placed in a 12 pack carton of diet soda. two cans were randomly selected from this 12 pack. what is the probability that both cans were regular soda?

15 oranges weigh 3.75 kilograms (kg). if each orange weighs approximately the same, approximately how much does each orange weigh?