0.0000000798 can be expressed in standard form as

7.98 × 10⁸

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7.98 × 10⁹

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7.98 × 10^-9

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7.98 × 10^-8

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Solution

The correct option is D
7.98 × 10^-8

Since the standard form of a number should have one non zero digit before decimal, so by moving the decimal 8 places right, we get 7.98 × 10^-8

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