Evaluate: \(\frac{0.42 \div 2.5}{0.5 \times 2.95}\), leaving the answer in the standard form.

  • A 1.639 x 10\(^2\)
  • B 1.639 x 10\(^1\)
  • C 1.639 x 10\(^{-1}\)
  • D 1.639 x 10\(^{-2}\)
waec 2019mathematics

The correct answer is C. 1.639 x 10\(^{-1}\)

\(\frac{0.42 \div 2.5}{0.5 \times 2.05} = \frac{0.168}{1.025}\)

= 1.639 x 10\(^{-1}\)

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