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Chemistry, 20.09.2020 16:01 zariahirons44

For the following numbers 1) state the number of significant figures
2) rewrite the number in scientific notation
A . 0.0805
B . 123,000
C . 102,000,505
D . 0.000020

please help... & explain

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For the following numbers 1) state the number of significant figures
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