What is the value of the expression 3 to the power of −4 ? a) -1/81 b) -81 c) -12 d) 1/81

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read?

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.