Answer:
The marginal benefit of running one more mile would outweigh the cost of the additional mile
Step-by-step explanation:
Marginal Cost and Marginal Benefit
Marginal cost and marginal benefit represent the way the value or the cost of an action, a service or product changes. Marginal cost and marginal benefit in production is such that a consumer considers the marginal benefit of a product to him while a manufacturer considers the marginal cost.
This then determines the actions or decisions of the consumer to buy the product, take the action or patronise the service, and it also determines the pricing and marketing decision of a manufacturer
Marginal benefit which can also be called maximum benefit has the tendency to however decrease as consumption or action decreases until it comes to a point where the consumer sees that the cost of the action outweighs the benefit and then stops the action.
The more marginal benefit one considers is derivable from a thing, the more action the individual is willing to take to acquire that thing. The more marginal benefit which also mean the maximum benefit a person seems to derive from an action, the more of that action the individual is willing to take.
In the case of Kara, she decides to run one more mile despite the tiredness because of the realisation that there is still a maximum benefit that outweighs the tiredness she is feeling.