Final answer:
Juan is on a fixed ratio schedule of reinforcement, and he gets paid $5 for every ten bags of nuts and bolts that he puts together.
Step-by-step explanation:
Juan is on a fixed ratio schedule of reinforcement.
A fixed ratio reinforcement schedule is when a set number of responses must occur before the behavior is rewarded. In Juan's case, he is paid $5 for every ten bags of 'nuts and bolts' that he puts together, which is a fixed ratio of 1:2 (one payment for every two bags).
Example: If Juan puts together 20 bags of nuts and bolts, he would receive $10 as a reward, since he completed two sets of 10 bags each.