All cubes are similar because every one of them have an equal width and length and height.
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You can take out 2x^3 from both terms making it
2x^3 (15+8x^2)
Answer is B
The unit rate is going to be calories per serving....calories / serving
Food A :
150 / (3/4) =
150 * 4/3 =
600/3 =
200 calories per serving
Food B :
250 / (2/3) =
250 * 3/2 =
750/2 =
375 calories per serving
Therefore, Food A has fewer calories per serving <==
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