4. a patient is to receive 1.5 grams (g) of an antibiotic in 3 equal does. if tablets available are 250 milligrams (mg), how many tablets should the patient take in each dose?

If the patient has to get 1.5 gram of the antibiotic in 3 equal doses,
in each dose, he has to take = 1.5/3 = 0.5 gram

0.5 gram = 0.5×1000 milligram = 500 milligram
amount of antibiotic in 1 tablet = 250 mg
for 500mg, no. of tablets = 500/250 = 2

So the patient should take 2 tablets in each dose.