Answer:
The marginal product of fifth worker = 50 gallons.
Step-by-step explanation:
4 workers produce = 450 gallons of milk
5 workers produce = 500 gallons of milk
The marginal product of fifth worker can be calculated by subtracting the total product when there are 4 workers from the total product when there are 5 workers.
The marginal product of fifth worker = 500 – 450 = 50 gallons.