Evaluate a multi-step numeric expression: Compute S = √(16 + (9.5 × 0.0085 × 18.9) / (0.021 × 0.0017 × 1.9)).

Introduction / Context:
This evaluates a nested expression mixing decimals and a square root. Careful order of operations and fraction handling are key.

Given Data / Assumptions:
S = √(16 + (9.5 × 0.0085 × 18.9) / (0.021 × 0.0017 × 1.9)).

Concept / Approach:
Compute the numerator and denominator separately, simplify the fraction, add 16, then take the square root.

Step-by-Step Solution:
Numerator: 9.5 × 0.0085 × 18.9 = 1.526175.Denominator: 0.021 × 0.0017 × 1.9 = 0.00006783.Fraction = 1.526175 / 0.00006783 = 22500 exactly (since the decimals reduce to 22500).Inside root: 16 + 22500 = 22516.S = √22516 ≈ 150.05, which rounds to 150 among the given choices.

Verification / Alternative check:
Quick check: since √22500 = 150 and our value is √22516, the answer must be just slightly above 150, so 150 is the nearest listed value.

Why Other Options Are Wrong:
154, 158, 160, 169 are far from the precise √22516 ≈ 150.05.

Common Pitfalls:
Losing precision in decimal multiplication/division or misapplying square root to the fraction before summing with 16.

Final Answer:
150