waecmaths question:
Multiply $2.7\times {{10}^{-4}}$ by $6.3\times {{10}^{6}}$ and leave your answer in standard form
Option A:
1.7 × 103
Option B:
1.70 × 103
Option C:
1.701 × 103
Option D:
17.01 × 103
waecmaths solution:
$\begin{align} & 2.7\times {{10}^{-4}}\times 6.3\times {{10}^{6}}=2.7\times 6.3\times {{10}^{-4+6}} \\ & =17.01\times {{10}^{2}} \\ & =1.701\times {{10}^{3}} \end{align}$
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