What is the surface area of the model tent below? (A) 950 sq cm
(B) 1,140 sq cm
(C) 990 sq cm
(D) 750 sq cm

What is the difference between regular convex and concave polygons

Can someone me and do the problem plz so i can understand it more better

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?