a football field team lost 9 yards during a play the team had a combined gain or loss of 0 yards after the next play. what integer represents the yards gained or lost on the next play? plus help idk

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.