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JAMB Mathematics 1990 Question 3

Question 3

Fractions, Decimals and Approximation

Correct 241.34 (3 × 10−3)2 to 4 significant figures

  1. A.0.0014
  2. B.0.001448
  3. C.0.0022
  4. D.0.002172
Show the answer and explanation

Answer: D (0.002172)

Explanation

(3 × 10−3)2 = 9 × 10−6, and 241.34 × 9 × 10−6 = 0.00217206, which is 0.002172 to 4 significant figures.