Answer: I'm pretty sure that it´s C but Im not sure.
Sorry if that's wrong.
Side of the room = x.
From the right triangle, where sides of the square are legs of the right triangle, and the diagonal of the square is a hypotenuse of the right triangle.
x²+x²=6²
2x²=36
x²=18
x=√18 =√(2*9)=3√2≈4.2m
3i = 105
To make i by itself, divide both sides by i.
i = 35
There you have it, 35 is the answer.
(-3)(8+-10)
(-3) • ( -2)
which equals 6