Consider a standard pitch scale of 220 hertz. If a musical performer identifies a 2 range of scale as ideal for both audience engagement and the instruments involved, how many total hertz does the range encompass? (You do not need to include the units. You only need to enter your answer as a number.)

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?