Answer:
9.4ft²
Explanation:
The formula for the area of a rectangle is base*height, or b*h.
Since we know the final area of the room and one of the side lengths, we can plug those into the formula I just stated so that we get
15*h=141
All that's left to do is solve for h, which is the other side that we are solving for. To do this, we will divide 15 on both sides:
15h/15=141/15
The 15s on the left side cancel out, and we simply divide 141 by 15 to get our final answer of 9.4ft².