The recommended dosage of a medicine is 4 milligrams per kilogram of body weight. What is the recommended dosage, in milligrams, for a person who weighs 84 kilograms?

Rationale

The recommended dosage for a person who weighs 84 kilograms is 336 milligrams.

To find the recommended dosage, you multiply the weight of the person by the dosage per kilogram: 4 mg/kg × 84 kg = 336 mg. This calculation ensures that the dosage is tailored to the individual's weight for safe and effective treatment.

A (21) YOUR ANSWER

This choice is calculated incorrectly; it may stem from an incorrect division or multiplication. To arrive at 21 mg, one would have to divide the weight or use an incorrect dosage per kilogram, which does not reflect the actual recommendation of 4 mg/kg.

B (88) YOUR ANSWER

The number 88 mg does not correspond to any logical calculation based on the dosage recommendation. It appears to be a random figure that does not factor in the correct multiplication of 4 mg/kg and 84 kg.

C (324) YOUR ANSWER

The choice of 324 mg also results from incorrect calculations. If one were to multiply the dosage by a smaller weight or miscalculate the multiplication, this could appear as a plausible answer, but it is not accurate for the given weight of 84 kg.

E (2100) YOUR ANSWER

This figure is far too high and likely results from a severe miscalculation. It may come from an erroneous assumption about the dosage per kilogram or a misunderstanding of the conversion process from kilograms to milligrams.

Conclusion

The correct recommended dosage for a person weighing 84 kilograms is 336 milligrams, calculated by multiplying the weight by the recommended dosage per kilogram. All incorrect options arise from miscalculations or misunderstandings of the dosage formula. Understanding how to apply the dosage correctly is crucial for ensuring effective medication administration.