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madreJ [45]
3 years ago
9

If the diameter of a circle is 142.8 milimeters, then what is the radius

Mathematics
1 answer:
Katen [24]3 years ago
3 0
O raio é de 71,4 milímetros
142,8mm/2 = 71,4
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Answer:

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By context I mean: if this the items are taken from some larger category for example: the ages of a few 'students' from a 'class'. Here 'students' are the sample from a larger set that is 'class'. The mean of the 'few students' will be called sample mean. In contrast, if we take the mean of the ages of the whole class then this is called population mean. (population mean == mean of the whole set)

In our case we aren't told exactly where these numbers come from, is this the whole set or a sample from it, the lack of context allows us to assume that the mean can either be population mean or sample mean. So we can safely use any symbol \mu or \overline{x}.

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