At the end of the night, Mrs. Johnson works with the student council to determine their profit on the fundraiser. The least popular item was chips, in which they sold only 21 bags. The chips cost a total of $48.10. Were the chips profitable? Explain your reasoning. (Each chip bag cost $1.75)

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.