A drawbridge will sometimes open up to let boats and other water traffic pass through. As it opens
, the surface of the drawbridge raises above the level of
the roadway, as modeled by the function:
Y-
h4+
d2
If the length of the drawbridge, r, is 25 meters, and the point Pis 16 meters
above the roadway, what is the distance d?

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.