Lena spent $8 so she has $4 left. A isn't right because the answer to that is 16. B isn't right because it equaled 8. C equaled 20. D equaled 4 so the answer is D.
25, because a cube that is 10x10 would have an area of 100. and the cubes that are 2x2 would have an area of 4. so you take 100 and divide it by 4. answer is 25.
