[poll id=”173″]
ANSWER
D. $616
It will cost $88 to paint an area of 90 square feet (9ft x 10ft). The new wall has 630 square feet (21ft x 30ft). Thus, the new area is 7x bigger (630 square feet / 90 square feet = 7), and thus, 7x more expensive.
7 x $88 = $616