Answer:
19.3 mg are needed
Explanation:
You can go about solving this in two different ways the first way/ hardest way is to convert the aspirin dose from mg/kg body weight to mg/ lbs body weight and then multiply by the 8.5 lbs body weight. The second/ easier way to get the answer would be to convert the infants body weight from lbs to kg. Then, multiply that by the dose, which will give you 19.3 mg. The math for that is below. Remember always start with the information that you know, to find the information that you don't know.
Hope this helps. If not just post a message and I will get back to you! :)