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WAEC Mathematics 2009 Question 6

Question 6

Fractions, Decimals and Approximation

Express the square root of 0.000144 in the standard form.

  1. A.1.2 × 10−4
  2. B.1.2 × 10−3
  3. C.1.2 × 10−2
  4. D.1.2 × 10−1
Show the answer and explanation

Answer: C (1.2 × 10−2)

Explanation

√0.000144 = 0.012 = 1.2 × 10−2.