Chemistry, 05.07.2019 08:00, Kjcampbell2

Iam doing a average atomic mass question. i have the answer to it, but it says to round it to 3 decimal places. the answer is 39.89982753. i don't know whether to round it to just the 39.899 or to actually round it to it being 39.900. if anyone could that would be

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Iam doing a average atomic mass question. i have the answer to it, but it says to round it to 3 deci...