Answer:
Option C is correct
11.1 inches
Explanation:
Area of the square(A) is given by:

where,
s is the length of one side of the square.
As per the statement:
Avi’s dining room measures 124 square feet and is in the shape of a square.
⇒A = 124 square feet.
By definition we have;

or

⇒
inches
Therefore, 11.1 inches is the best estimate of the length of one side of the room, to the nearest tenth of a foot