Answer:
8 cans
Step-by-step explanation:
The area of the wall is the product of its dimensions:
(7.5 ft)·(9.75 ft) = 73.125 ft^2
Twice that area is ...
2 · (73.125 ft^2) = 146.25 ft^2
At 20 ft^2 per can, the number of cans required is ...
(146.25 ft^2)/(20 ft^2/can) = 7.3125 cans
We assume you cannot buy a partial can, so ...
you would need to buy 8 cans of paint for the wall.
