Abag of marbles contains 5 red, 3 blue, 2 green, and 2 yellow marbles. what is the probability that you choose a red marble and then a green marble assuming you replace the first marble? a)1/24 b)5/72 c)5/66 d)5/6 (and could you explain how you got the answer ? )

Your vet has placed your pet on a diet. the diet is to contain at least 12 mg of fat and at least 14 mg of protein per serving. these requirements are to be obtained from two food sources. source a contains 2 mg of fat and 2 mg of protein per serving. source b contains 1 mg of fat and 3 mg of protein per serving. if source a sells for $1.28 per serving and source b sells for $1.12 per serving, how many servings of each type should be purchased to satisfy the requirements at minimal cost?