Solve |x| = -15 { } {-15} {-15, 15}

Is a positive integer raised to a negative power always positive

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.

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?