Use the Ratio Test to determine if the following series converges absolutely or diverges. sigma^infinity_n = 1 (- 1)^n n^2 (n + 2)!/n!7^n
Since the limit resulting from the Ratio Test is, the series converges absolutely.
(Simplify your answer.)

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?