Answer:
10 ounces
Explanation:
What you have to do is take the 20 ounces and multiply that by the 3.5 which give you 70. You then take away that 0.5 and do 20 multiplied by 3 which gives you 60. You then take your 70 from before and your 60 and minus them from one another. 70-60=10 which give you your answer of 10 ounces.