Final answer:
The subject of this question is Physics, specifically accuracy in measurements and the example of measuring the length of computer paper.
Step-by-step explanation:
In the given context, the subject of this question is Physics as it relates to the concept of accuracy in measurement. Accuracy refers to how close a measurement is to the correct value. It is crucial in scientific experiments and observations.
In this case, the example of measuring the length of computer paper demonstrates accuracy. If the measurements are close to the correct value, they are considered accurate. For instance, if the measurements are 11.1 in., 11.2 in., and 10.9 in., they are quite accurate since they are very close to the correct value of 11.0 inches.