Correct Answer: Option C

Explanation

\((1.28 \times 10^{4}) \div (6.4 \times 10^{2})\)

= \(\frac{1.28 \times 10^{4}}{6.4 \times 10^{2}}\)

\(\equiv \frac{12.8 \times 10^{3}}{6.4 \times 10^{2}}\)

= \(2 \times 10^{1}\)

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