One monthSusan rented 3 movies and 2 video games for a total of $21. The next month she rented 5 movies and 6 video games for a total of $53. Find the rental cost for each movie and each video game.

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.