David has a car which uses petrol and does 27 miles for every pound
spent on fuel. If David were to drive to work each day, how much would he spend on fuel in a week (give
your answer to the nearest penny)?

He travels 75 miles a week.

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?