Final answer:
The approximate side length of Rafe's kiddie pool falls between the whole numbers 14 and 15 feet, as the square root of its area (220 square feet) is approximately 14.83 feet.
Step-by-step explanation:
The question asks us to determine the approximate side length of Rafe's kiddie pool, which has an area of 220 square feet. To find the side length of a square, we need to take the square root of its area. Therefore, we calculate the square root of 220 to find the side length of the pool.
The square root of 220 is approximately 14.83 feet. Since we need to find the whole numbers between which this side length falls, we can see that 14.83 is between the whole numbers 14 and 15.