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Write the following numbers in standard ...

Write the following numbers in standard form: `0. 4579` (ii) `0. 000007` `0. 000000564` (iv) `0. 0000021` `216000000` (vi) `0. 0000529\ x\ 10^4` `9573\ x\ 10^(-4)`

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The correct Answer is:
`2.16 xx 10^(8)`
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