A pig went to buy materials to build a straw home. He had an initial cost of $10, and an extra $10 per unit of straw. Write a linear equation representing the cost of the straw house if C is the cost in dollars and U is the number of units

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.