How would you express 4 kg in grams?

To express 4 kilograms in grams, it's important to know the relationship between kilograms and grams. One kilogram is equivalent to 1,000 grams. Therefore, to convert kilograms to grams, you multiply the number of kilograms by 1,000.

In this case, with 4 kilograms:

4 kg x 1,000 g/kg = 4,000 g

Thus, 4 kilograms is equal to 4,000 grams. This makes the correct answer accurate, as it reflects the proper conversion from kilograms to grams based on the standard conversion rate.