Averages allow you to see through variability. An average is a surprisingly stable but delicate figure. For instance, you could have a 3 month average of highly variable data equalling $100/mo, but you could add 10 years worth of highly variable data to the 3 months of data, and still have a result of $100/mo
Accuracy.
To get a better estimate.
They are centre to centre, but given the relative measures and the fact that the distances are averages over elliptical orbits rather than circular ones, the difference between the two is irrelevant.
Structuralism
Think of a plastic bag filled with water. It makes more sense to describe the amount of water within the bag by it's volume vice the bag's dimensions.
You get an accurate answer with it rather than using semi quantitative methods to get estimated results.
They do not. They can represent definite numbers just as well and definite numbers can be averages.
Subjective results are outcomes or findings that are influenced by personal opinions, feelings, or interpretations rather than objective measurements. These results can vary depending on individual perspectives and experiences, making them open to interpretation.
It may be possible to generalise results to other integer values.
Aluminium oxide is an example of corrosion of advantage rather than disvantage
Evolution is a gradual process that occurs through natural selection. Natural mutation results in some offspring.
People work out averages to get a general sense about something. An average will also allow a person to put findings in a group rather than having a bunch of separate findings.
I would rather be paid a steady salary than be paid by results
For heat loss to be an advantage to humans rather than a disadvantage, the heat lost must be equal to that produced.
They had smaller, faster ships that were a big advantage rather than Spain's ships.
When a person talks to a person or a few persons directly rather than a large group or an audience. When written, an individual communication is a letter to an individual rather than a reproduced mass mailing. This answer is an individual communication in that it is an original answer written for this question.
Increased friction reduces the actual mechanical advantage of a machine because more of the input force is used to overcome friction rather than move the load. This results in less of the input force being effectively transferred to the load, decreasing the overall efficiency of the machine.