Answer:
C. 11.1 feet
Step-by-step explanation:
The area of a square is given by the following equation:
\(A=L^{2}\)
Where L is the length of one side of the room.
Additionally, in this case, the unit of the area is square feet and the unit of L is feets.
From the question we know that the area of the square is 124 square feet. Replacing A by this value, we get:
\(124=L^{2}\)
Then, isolating L by making a square root on both sides, we get:
\(\sqrt{124} =\sqrt{L^{2} } \\\sqrt{124}=L\\ 11.135=L\)
Finally, the side L of the square have a length of 11.135, so the nearest tenth of that length is 11.1 feets.
