Correct Answer: Option C

Explanation

0.00043 x 2000

= 43 x 10^-5 x 2 x 10³

= 43 x 2 x 10^-5+3

= 86 x 10^-2

= 8.6 x 10¹ x 10^-2

= 8.6 x 10^-1

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