A paperweight is made from a solid sphere of aluminum. The radius of the sphere is 1.75 inches. The aluminum used to make the sphere weighs 1.56 ounces per cubic inch and costs $0.90 per pound. Determine the cost to make the paperweight.

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.