Measuring Digits are TWELVE (inches) in the British System
and HUNDRED (centimetres) in the Metric System
significant digits. for short they are called "sig. figs."
It is important to consider the precision of the measuring equipment.
Significant
Start by measuring accurately, then just remove digits until you have the precision you want.
6 digits
Some possible sources of lab error. 1. Not preciously measuring. 2 Air pressure (not being at STP). 3 Not all liquid evaporating when measuring a solid. 4 How many significant digits are used and when rounded
6
12 digits.12 digits.12 digits.12 digits.
estimated
A quadrillion has 16 digits.
Seven digits.
3 digits!