1.

 (0.9 * 0.9 * 0.9 + 0.8 * 0.8 * 0.8) / (1.6 * 1.6 * 1.6 + 1.8 * 1.8 * 1.8) = ?

A. 0.125
B. 0.25
C. 0.5
D. 0.625
Answer» B. 0.25


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