Final answer:
To find the side length of a square with an area of 150 square units, calculate the square root of the area, which gives an approximate value of 12.247. It rounds down to 12, so the length of a side of the square is approximately 12 units.
Step-by-step explanation:
To find the length of a side of a square with an area of 150 square units, you need to take the square root of the area. This is because the area of a square is equal to the length of one side squared.
The equation to use is:
Area = side × side
If the area is 150 square units, then:
√(150) = side length
When you calculate the square root of 150, you get an approximate value of 12.247, which rounds down to 12 for this multiple choice question. Therefore, the length of a side of the square is approximately 12 units.