Answer
The tour boat operator needs to decide whether to buy a new boat to increase the income obtained per day or increase the number of trips made per day and avoid buying a new boat.
Step-by-step explanation
Marginal cost measures the change in cost over the change in quantity. Marginal benefit is a measurement of change in benefits over change in quantity. The boat operator is going to buy a new boat. Will the marginal cost (how the boat cost) be greater than the marginal benefit( income from increased number of boats).