Final answer:
The questions relate to calculating expected numbers and probabilities as part of a high school mathematics curriculum, likely dealing with geometric or binomial distributions and basic rate calculations.
Step-by-step explanation:
The question seems to involve a scenario where a student is attempting to figure out statistics or probability related to specific outcomes. For instance, determining the expected number of pages to be surveyed to find an advertisement for footwear, or the probability of finding that advertisement within a certain number of pages, relates to probability concepts often taught in high school mathematics.
Looking at aspects of the question like the expected number of dealerships a person would have to call to find a car, or the probability of calling at most four dealerships, this implies calculating the mean of a geometric distribution or perhaps using a binomial probability distribution, depending on the context provided in the question.
For the situation regarding DVD rentals, we're again looking at expected values—calculating the expected number of DVDs rented based on the estimate of customers, which involves basic multiplication and understanding of rates or proportions.