My final balance after 48 months was $896.00. If I originally put $800.00 into the bank, what was the interest rate? (Hint: Write as a percentage with percent symbol.)

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.