WAEC Mathematics 2008 Question 3

Question 3

Fractions, Decimals and Approximation

Find the product of 0.0409 and 0.0021 leaving your answer in the standard form.

  1. A.8.6 × 10−6
  2. B.8.6 × 10−5
  3. C.8.6 × 104
  4. D.8.6 × 105
Show the answer and explanation

Answer: B (8.6 × 10−5)

Explanation

0.0409 × 0.0021 = 0.00008589 ≈ 8.6 × 10−5.