Respuesta :
Answer:I believe the answer is 12 because it takes 4, 1/4 unit cube to make 1 cubic unit so to make 3 cubic units you need 12, 1/4 unit cubes if that makes any sense. :) Please make Brainliest if this helped.
Hey listen, I know exactly where you got this question from; Khan Academy and listen, I know the answer:
It's 135.