Answer: 4
Explaination: In order to fine the volume of a cube typically the formula is S to the power of three or the number multiplied 3 times ex 6x6x6
Since the volume in 64 you can plug that into you can take 64 divide that in half so by 2
64 divided by 2 and you will get 32 after that you can divide by 2 again since you need to do it 3 times Becuase it’s the opposite of multiplying. Then you will get 16. The square root of 16 is 4 is the side of a cube is 4 :). This was a very complicated way of doing it but it you know the formula for volume of a cube which is S to the power of three you can multiply a number 3 times and see if it equals 64.
