√10.89 +√0.1089 +√0.001089 +√0.00001089 +√0.0000001089 = ?
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Correct answer: C
Explanation
√10.89 + √0.1089 + √0.001089 + √0.00001089 + √0.0000001089
According to the formula:
√(a × 10ⁿ) = √a × 10ⁿ/²
√10.89 = 3.3
√0.1089 = 0.33
√0.001089 = 0.033
√0.00001089 = 0.0033
√0.0000001089 = 0.00033
Sum= 3.3 + 0.33 + 0.033 + 0.0033 + 0.00033= 3.66663