A pharmacist needs to combine a mixture for a patient. She uses 5 mg of antibiotic for 25 mg of the mixture. If the patient needs 100 mg of the mixture, how much antibiotic should the pharmacist use?
20 mg
30 mg
80 mg
120 mg
500 mg

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

What is a rational number between 9.5 and 9.7

Joseph haydn pet store offers wide variety of leashes for dogs. the store purchases one popular type of leash from its manufacturer for $4.38 each. joseph haydn pets marks up leashes at a rate of 238% of cost. what is the retail price of the popular leash?