Maxwell is trying to figure out how much water he needs to fill his aquarium. He knows that his aquarium has measurements of 8 inches wide, 9 inches long, and 12 inches high. He plans to put a solid metal chest in the bottom of the aquarium that has a base area of 30 inches and a height of 4 inches. How much water will he need to fill the aquarium? Try to draw a model to match your thinking. Answer quickly please.

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?