The cost of an item is 100% of its price. What number goes in place of ? In the addition problem?

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.

Need same math paper but the back now i hope your able to read it cleary i need with hw

In triangle abc, angle c is a right angle. find the value of the trig function indicated. find tan a if c = 17 and a = 8