Difficulty: Easy
Correct Answer: 19/32
Explanation:
Introduction / Context:Converting decimals to exact fractional forms often reveals perfect-square structure. Here, we simplify inside the radical first, then take the square root.
Given Data / Assumptions:
Concept / Approach:Multiply numerator and denominator to remove decimals and look for squares. Note that 36.1/102.4 = 361/1024 after scaling by a factor of 10 in numerator and denominator.
Step-by-Step Solution:
36.1/102.4 = (361/10) / (1024/10) = 361/1024.Now √(361/1024) = √361 / √1024.√361 = 19, √1024 = 32.Therefore, value = 19/32.Verification / Alternative check:Compute (19/32)^2 = 361/1024 = 36.1/102.4, confirming exactness.
Why Other Options Are Wrong:
Common Pitfalls:Mis-scaling decimals or taking the square root of 1024 wrongly. Remember 1024 = 2^10, so √1024 = 32.
Final Answer:19/32
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