Danielle has $35 to spend on birthday presents for 2 of her friends. she has already spent a total of $6 on the cards. if she wants to spend the same amount on each friend, how much can she spend on each present?

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.