Acube has side length a . the side lengths are decreased to 20% of their original size. write an expression in simplest form for the volume of the new cube in terms of a .

Given a cube of length, a, then when decreased by 20%, what's left is actually 80% of the original. So, for this case, we have a cube with a length of 80%(a) = 0.80a.

Now, to compute for the volume of a cube, we multiply the length three times to itself. Or, in other words, raise the length to the third power. That means the volume of the new cube is (0.8a)³ = 0.512a³ cubic units.

 0.512a³ cubic units

The answer would be b

The answer to your question is 1/9