A door to a playhouse is 50 inches tall. Which of the following is another measure equal to the height? A. 4 ft 2 in.
B. 4 ft 1 in.
C. 4 ft 12 in.
D. 5 ft

(By the way I am garbage at math)

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?