Final answer:
There are 5,000 milligrams in 5 grams, as one gram equals 1000 milligrams. To convert grams to milligrams, multiply the number of grams by 1000.
Step-by-step explanation:
To find out how many milligrams are in 5 grams, we need to know the relationship between grams and milligrams. One gram is equivalent to 1000 milligrams. Therefore, to convert grams to milligrams, we multiply the number of grams by 1000.
Following this conversion method:
5 grams × 1000 milligrams/gram = 5000 milligrams
So, there are 5000 milligrams in 5 grams. Hence, the correct answer is A) 5,000 mg.