Final answer:
The perimeter of the rectangular window, whose length is 4 feet more than its width, is represented by the expression P = 2(w + 4), which corresponds to answer choice B.
Step-by-step explanation:
To find the perimeter of a rectangle, you use the formula P = 2l + 2w, where P is the perimeter, l is the length, and w is the width. In this problem, we're given that the length is 4 feet more than the width (w), so the length can be represented as w + 4. Therefore, the formula for the perimeter becomes P = 2(w + 4) + 2w, which simplifies to P = 2w + 8 + 2w or P = 4w + 8. This means the correct answer is B. P = 2(w + 4), as it appropriately represents the perimeter of the rectangular window.