-100 represents 100 minutes before an airplane takes off. 100 represents 100 minutes after the airplane takes off. What does zero represent in this situation? O A. The speed of the airplane when it takes off O B. The time when the airplane lands O C. The instant at which the airplane takes off D. The time when the airplane is standing still

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?