Answer:
16 days
Explanation:
The amount of days the medication will last can be determined by dividing the total amount of medicine by the daily amount used. This can be represented by the following formula:
amount of days = total amount ÷ daily amount
In Shawn's case, the daily amount of medication used is 8 ounces per day (8 oz per day) and, as written, there are 128 total ounces of medication (128 oz total)
128 oz total / 8 oz per day = 16 days
At 8 ounces of medicine administered daily, 128 ounces of medicine total should last Shawn 16 days.
