Respuesta :

Answer:

The answer is 420 milligrams

Step-by-step explanation:

Answer:

420 mg

Step-by-step explanation:

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