Alibrarian is interested in the numbers of books that visitors check out from the library. she examines the checkout records of 250 randomly selected adult visitors. identify the population and sample for this situation.

Abank manager wants to encourage new customers to open accounts with principals of at least $2,500. he decides to make a poster advertising a simple interest rate of 3%. what must the principal be if the bank manager also wants to advertise that one can earn $10 the first month? can the poster correctly say, "open an account of $2 comma 500 and earn at least $10 interest in 1 month! "?