Final answer:
The statement P(10)=N means that the function P(t) is being evaluated at the time t = 10 hours past midnight on a specific day, and the result of the evaluation is N.
Step-by-step explanation:
The statement P(10)=N means that the function P(t) is being evaluated at the time t = 10 hours past midnight on a specific day, and the result of the evaluation is N.
In the context of the problem, P(t) models the number of people at Copacabana beach in Rio de Janeiro at a given time, with t representing the number of hours past midnight. So when we say P(10)=N, we are saying that at 10 hours past midnight on a specific day, there are N people at the beach.