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.

## Answer This Question

## Related Questions

- Physical Science - 1. Which equation correctly shows beta decay? (A) 210/82 Pb...
- Chemistry - Po-210 Ia an alpha emitter with a half-life of 138 days. how many ...
- Physics - Item 4 Two 2.0 masses are 1.0 apart on a frictionless table. Each has ...
- physics - Item 4 Two 2.0 masses are 1.0 apart on a frictionless table. Each has...
- Physics - If a polonium-210 (Po-210) atom has just decayed, how close can the ...
- Physics - If a polonium-210 (Po-210) atom has just decayed, how close can the ...
- physics - If a polonium-210 (Po-210) atom has just decayed, how close can the ...
- Nuclear Physics - If a polonium-210 (Po-210) atom has just decayed, how close ...
- Nuclear Physics - If a polonium-210 (Po-210) atom has just decayed, how close ...
- math - Find the mean of the following set of numbers. 13, 15, 18, 18, 18, 19, 22...

More Related Questions