First: 6 Tables of amoxicilin per day
Second: The patient have to follow the treatment for 11 day
Third: Each table of amoxicilin contains 150 mg
1. 6 tables per day:
If:

Where x is te quantity in mg per day.

Now, the treatment is for 11 day:

The quantity of amoxicilin in 11 days is : 9900 mg.
Now, we have to convert mg to Oz:
We know that: 1 gram is equal to 0.035274 Oz. Therefore:

Answer: The medication of amoxicilin in 11 days is: 0.35 Ounces.