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WAEC 2024 · Paper 1 · Q1

Multiply 3.4×10−53.4 \times 10^{-5} by 7.1×1087.1 \times 10^{8} and leave the answer in standard form.

Worked solution (try it first)
  1. Multiply the numbers: 3.4×7.1=24.143.4 \times 7.1 = 24.14.
  2. Add the powers: 10−5×108=10310^{-5} \times 10^8 = 10^3.
  3. So the product is 24.14×10324.14 \times 10^3.
  4. 24.14 is more than 10, so write it as 2.414×102.414 \times 10.
  5. The answer is 2.414×1042.414 \times 10^4, option C.

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