Posted by **Joanne** on Thursday, November 6, 2008 at 10:21pm.

Expressed to the correct number of significant figures, the sum of two masses is 445.2 grams. WHich two masses produce this answer?

1) 210.10 g+235.100g

2)210.100 g + 235.10 g

3) 210.1 g + 235.1 g

4) 210.10 g+ 235.10 g

I think the answer is 2 but I don't know the reason why.

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