At the movies, you order 3 boxes of popcorn and a bottle of water. The cost of a bottle of water is $1.75. Your total cost is $9.25. Write and solve an
equation to find the cost of one box of popcorn.

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.