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$0.04\times 0.0162$ is equal to:

1. $6.48\times 10^{-8}$
2. $6.48\times 10^{-4}$
3. $6.48\times 10^{-9}$
4. $6.48\times 10^{-7}$

edited | 40 views

Option B is correct.

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