The radius of the base of a cylinder is 10 centimeters and it’s height is 20 centimeters. A cone is used to fill the cylinder with water. The radius of the cones base is 5 centimeters, and it’s height is 10 centimeters. The number of times one needs to use the completely filled cone to completely fill the cylinder with water is

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.