The dosage of a medication is 2.5 mg per kilogram of body weight. For a patient weighing 72 pounds (1 lb = 0.453 kg), what is the dose rounded to the nearest 25 mg?

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Multiple Choice

The dosage of a medication is 2.5 mg per kilogram of body weight. For a patient weighing 72 pounds (1 lb = 0.453 kg), what is the dose rounded to the nearest 25 mg?

Explanation:
You find the dose by converting weight to kilograms, multiplying by the dose per kilogram, and then rounding to the nearest 25 mg. Convert 72 pounds to kilograms: 72 × 0.453 = 32.616 kg. Multiply by the per-kilogram dose: 32.616 × 2.5 = 81.54 mg. Round to the nearest 25 mg: the closest multiples are 75 mg and 100 mg. 81.54 mg is closer to 75 mg (difference 6.54 mg) than to 100 mg (difference 18.46 mg). Therefore, the rounded dose is 75 mg.

You find the dose by converting weight to kilograms, multiplying by the dose per kilogram, and then rounding to the nearest 25 mg.

Convert 72 pounds to kilograms: 72 × 0.453 = 32.616 kg.

Multiply by the per-kilogram dose: 32.616 × 2.5 = 81.54 mg.

Round to the nearest 25 mg: the closest multiples are 75 mg and 100 mg. 81.54 mg is closer to 75 mg (difference 6.54 mg) than to 100 mg (difference 18.46 mg).

Therefore, the rounded dose is 75 mg.

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