Answer:
The answer is 420 milligrams
Step-by-step explanation:
420 mg
1000 mg in 1 g
so if 100 mg in 1g how many mg in 0.42 g?
[tex]\frac{1000 mg}{1 g} =\frac{x mg}{0.42 g}[/tex]
(0.42*1000)/ 1g = 420 mg