Answer:
The answer is 140
Explanation:
The first step is simple L x W which will give us.
L being 5 and W being 3.5 The equation is 5 × 3.5 = 17.5.
With that being said I just need to multiply that answer by 8 which gives us 140.
This means that he will need 140 ft of light in order to put light around each window.
Hope this helped :)