A piece of paper is folded into thirds multiple times. The area, A, of the piece of paper in square inches, after n folds, is A = 90(0.33)". a. What is the value of A when n=0?
b. How many folds are needed before the area is less than 1 square inch?

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?