Evaluate: (0.1^3 + 0.01^3) divided by (0.5^3 + 0.05^3).
0.025
0.125
0.05
0.008
Correct answer: 0.008
Solution
Each numerator term equals 0.2 times the corresponding denominator base, so cubing pulls out a factor of 0.2^3. The bracketed sums cancel, leaving 0.2^3 = 0.008.