Answer:
The degree of precision is 0.1 cm and could be improved by using a ruler with more markings.
Step-by-step explanation:
In a scientific experiment using an instrument, how close the individual readings of the measurement of an experiment determine the precision of an instrument.
The precision doesn't mean the observed values are close to the real values.
When an experiment uses a higher resolution instrument, the precision of the reading increases.
It helps to get a precise value for scientific entities.
When the marking is increased in a ruler, it would definitely help to improve the precision of a measurement.