486/6 = 81
Square root 81 = one side length = 9m volume = 9^3 = 729
Answer:

Step-by-step explanation:
The fact that the figure is a cube means all sides, faces, and corners are equal.



Answer:
explanations: we multiply with a rational surd
(x-9)*√(x+9)/(√(x-9)*√(x+9)
=(x-9)√(x+9)/

B.( x-9)/√x+3 =( x-9)*(√x-3)/(√x+3)*(√x-3)
= (x-9)*(√x-3)/x-9
=√x-3
Whenever you see <em>x </em> next to a 3, and it says that it equals 9, you know that 3•3=9.
1288991/7776
Mark brainliest please
Hope this helps you