John wants to simplify the expression (5+3) to the power of 2. as a first step, he writes 5 to the power of 2+3to the power of 2. will he get the correct value for the expression? if not, what should he do to simplify the expression

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.