Erin is filing novelty balloons for her sister's cat-themed birthday party. When full, each balloon will be in the shape of a sphere with two cones. The sphere has a radius of 6 inches. The cones each have radius 2 in. and
height 6 in. She rents a helium tank that contains 14 ft of helium. How many balloons can Erin fill?

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?