Nicole tutors history. For each hour that she tutors she earns 50 dollars. Her earnings, (E) in dollars, after tutoring for (h) is given by the following function. E(h)=50h

How much does Nicole earn if she tutors for 3 hours?

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?