The amount w of water used varies directly with the population 'n' of people. city 'a' has a population of 483,000 people and used 37.6 billion gallons of water in a fiscal year. find out how many billion gallons of water we would expect city 'b' to use if we know that its population is 150,000 w= billion of gallons of water type an integer or decimal rounded to the nearest tenth as needed.

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.