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JAMB 1995 · UME · Q5

Express the product of 0.0014 and 0.011 in standard form.

Worked solution (try it first)
  1. Write each number in standard form: 0.0014=1.4×10−30.0014 = 1.4 \times 10^{-3} and 0.011=1.1×10−20.011 = 1.1 \times 10^{-2}.
  2. Multiply the numbers, 1.4×1.1=1.541.4 \times 1.1 = 1.54, and add the powers, 10−3×10−2=10−510^{-3} \times 10^{-2} = 10^{-5}.
  3. So the product is 1.54×10−51.54 \times 10^{-5}, option D.

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