MCAT Math Question 13: Answer and Explanation
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Question: 13
13. A 150 pound man must be given a drug that is dosed at 
Approximately how many milligrams of the drug should be administered per dose? (Note: 1 lb = 4.45 N)
- A. 33 mg
- B. 67 mg
- C. 100 mg
- D. 225 mg
Correct Answer: C
Explanation:
Because grams are a unit of mass and pounds are a unit of force, we must first convert pounds to newtons, and then divide by the acceleration due to gravity to find kilograms. The weight of the person in newtons is
This corresponds to a mass of
Now, we can determine the dose:
