A square has an area of 49 square inches. What is the length of one side?

To find the length of one side of a square when the area is known, you can use the formula for the area of a square, which is:

Area = side length × side length

In this case, we know the area is 49 square inches. To determine the length of one side, you can take the square root of the area:

side length = √(area) = √(49) = 7

Thus, the length of one side of the square is 7 inches. Therefore, the correct answer is indeed the one that states the side length is 7.

This calculation is straightforward because the area of a square is simply the side length multiplied by itself, and taking the square root of the area gives the original side length.