#### Answer

a) 180mg
b) 6 pills

#### Work Step by Step

a)
Each patient recives 3 60mg doses
Thus, total mg of phenobarbital receieved = $3\times60=180$mg
b) One pill contains 30 mg of the drug, to find total amount of pills needed, we divide the total milligrams of the drug my the amount in one pill:
$180\div30=6$
Thus, the patient receives 6 pills