WAEC Mathematics 2024 Question 1

Question 1

Fractions, Decimals and Approximation

Multiply 3.4 × 10−5 by 7.1 × 108 and leave the answer in standard form.

  1. A.2.414 × 102
  2. B.2.414 × 103
  3. C.2.414 × 104
  4. D.2414 × 105
Show the answer and explanation

Answer: C (2.414 × 104)

Explanation

3.4 × 7.1 = 24.14 and 10−5 × 108 = 103, so the product is 24.14 × 103 = 2.414 × 104.