50.4 has three significant digits.
5 significant figures.
2 of them.
38 cm
They tell you what level of precision you can expect from measurements that are made using that instrument.
Measurements need to be specific so we use significant digits.
4
When multiplying/dividing measurements the answers needs to have the same amound significant figures as the one with the LEAST amount
50.4 has three significant digits.
Any measurement may have two significant digits.
302.5 grams
2 of them.
5 of them.
30.5 cm
2 of them.
102.3 cm
3.2 cm