Please help me Each month, a certain water company charges a service fee of $20 plus $1.50 per 100 cubic feet of water used. In addition, the company charges 7% tax on the two charges.
Which equation describes the relationship between Y , the total of the charges and the tax, per month in dollars, and X , the number of cubic feet of water used that month?

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.