Answer:
1.33 walls
Explanation:
The opportunity cost of Amy is what she is expecting to give up in order to get something else. In this scenario Amy either paints 8 walls per hour or do 6 outlets per hour.
So we can write that,
o=number of outlets per hour by Amy
w=number of walls per hour by Amy
[tex]6o=8w\\\\o=\frac{8w}{6}\\ \\o=1.33w[/tex]
For each outlet, 1.33 wallets are not done.