Question

A sidewalk of width 2 feet is being built around a pool. Which expression represents the area of the sidewalk?

Answer 1

Use the formula for area!

Answer 2

I would assume it's the area of both the sidewalk and pool combined (79ft x 49ft = 3,871) minus the area of the pool alone (75ft x 45ft = 3,375). The area of the sidewalk would then be 496 ft$x^{2}$.