Final answer:
To calculate the perimeter of a square with a side length of 15 inches, we use the formula P = 4s, which gives us a perimeter of 60 inches.
Step-by-step explanation:
The question asks us to apply the perimeter formula for a square, which is P = 4s, wherein P represents the perimeter and s represents the side length of the square. In this particular case, the side length given is 15 inches. Therefore, we can calculate the perimeter by substituting the value of s in the formula:
P = 4s = 4(15 inches) = 60 inches
So, the perimeter of the square with a side length of 15 inches is 60 inches.