Evaluate: (0.04)^(−1.5)
Aptitude
Surds and Indices
Difficulty: Easy
Choose an option
-
A25
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B125
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C250
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D625
Answer
Correct Answer: 125
Explanation
Concept / Approach
- a^(−k) = 1 / a^k, and fractional exponents correspond to roots.
- Rewrite 0.04 in fractional form.
Step-by-step calculation0.04 = 4/100 = 1/25 = 25^(−1)(0.04)^(−1.5) = (25^(−1))^(−1.5) = 25^(1.5)25^(3/2) = (√25)^3 = 5^3 = 125
Final Answer125