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Multiple choice

Approximate value of $\dfrac{1}{\sqrt{0.8}}$.

  1. $1.2$
  2. $1.3$
  3. $1.1$
  4. $0.1$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

1 / sqrt(0.8) = 1 / sqrt(4/5) = sqrt(5) / 2. Since sqrt(5) is approximately 2.236, 2.236 / 2 = 1.118, which is approximately 1.1.

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