A zookeeper administers 1200 mg of Streptomycin to a pot-bellied pig over 24 hours, dosing every 6 hours. What is the amount per dose?

A zookeeper administers 1200 mg of Streptomycin to a pot-bellied pig over 24 hours, dosing every 6 hours. What is the amount per dose?

• A. 300 mg
• B. 400 mg
• C. 200 mg
• D. 100 mg

Answer: (A)

Dividing a total daily dose by the number of doses in a day is the key idea. With a 24-hour period and dosing every 6 hours, there are four doses in a day (24 ÷ 6 = 4). So each dose is 1200 mg ÷ 4 = 300 mg. Thus the amount per dose is 300 mg. If the dosing frequency were different, the per-dose amount would change accordingly (e.g., fewer doses would mean a larger per-dose amount, more doses would mean a smaller per-dose amount).

Dividing a total daily dose by the number of doses in a day is the key idea. With a 24-hour period and dosing every 6 hours, there are four doses in a day (24 ÷ 6 = 4). So each dose is 1200 mg ÷ 4 = 300 mg. Thus the amount per dose is 300 mg. If the dosing frequency were different, the per-dose amount would change accordingly (e.g., fewer doses would mean a larger per-dose amount, more doses would mean a smaller per-dose amount).