Answer
740 mg
Work Step by Step
We know that 1 g = 10 dg
We know that 1 g = 1000 mg
We can convert 7.4 dg to units of mg.
$7.4~dg = \frac{7.4~dg}{1}\times \frac{1~g}{10~dg}\times \frac{1000~mg}{1~g}$
$7.4~dg = 740~mg$
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