Final answer:
Len needs to buy 3 cans of paint.
Step-by-step explanation:
To find out how many paint cans Len needs to buy, we need to calculate the area of the wall and then divide it by the coverage provided by one can of paint. The formula to find the area of a rectangle is length × width.
Given that the dimensions of the wall are 8 feet by 10 feet, the area of the wall is 8 × 10 = 80 square feet.
Since 1 can of paint covers an area of 32 square feet, Len needs to buy 80 ÷ 32 = 2.5 cans of paint. Since he can't buy a fraction of a can, he will need to buy 3 cans of paint (option A).