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JAMB Mathematics 1987 Question 12

Question 12

Indices

Evaluate without using tables
(0.008)−1/3 × (0.16)−3/2

  1. A.625/8
  2. B.8/625
  3. C.1/8
  4. D.8
Show the answer and explanation

Answer: A (625/8)

Explanation

0.008 = 1/125, so (0.008)−1/3 = 5. 0.16 = 4/25, so (0.16)−3/2 = (25/4)3/2 = 125/8. The product is 625/8.