At time (t) hours after taking the cough suppressant hydrocodone bitartrate, the amount, a, in mg, remaining in the body is given by a = 14(0.8)^t.. what percent of the drug leaves the body each hour? . how much of the drug is left in the body 2 hours after the dose is administered? how long is it until only 1 mg of the drug remains in the body?

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?