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## Homework Statement

1) how do I know if the significant digit is supposed to be of " infinite sig-digs" ? If it is a constant value that is universally known, ike density then i understand that. But lets say i were to do ...

35+273.15

## Homework Equations

addition?

## The Attempt at a Solution

when adding, you go to the least amount of decimal places. so does that mean I just use a whole number?