The volume of a rectangular prism is 84 cubic inches. The length of the prism is 7 inches. The width of the prism is 4 inches. What is the height of the prism?

A. 14.0
B. 1.5
C. 7.6
D. 3.0

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?