A stack of 500 pieces of paper is 1.875 inches tall. Diego guesses that each piece of paper is 0.015 inches thick. Explain how you know that Diego's answer is not correct. Compute the thickness of each piece of paper. Show your reasoning. i really dont know this -_-

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?