A store sold more colored shirts than white shirts. The write shirts cost 9.95 and colored cost 10.50 if a total of 310.60 were sold , how many of each type were sold

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.