The height of a ball after t seconds when thrown straight up with an initial speed of 70 feet per second from an initial height of 5 feet can be modeled by the function s (t) = -16t to the square power +70t+5. what is the height of the ball 50 feet at approximately ? seconds?

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.