Dosage Math第 73 / 100 题
Ratio and proportion: if 250 mg is contained in 5 mL, how many mL contain 100 mg? (Set 250/5 = 100/x)
a.1 mL
b.2 mL
c.4 mL
d.5 mL
解析
Cross-multiplying: 250x = 5 × 100 = 500, so x = 2 mL. Ratio and proportion is a reliable method for liquid dosage problems when units match.
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