Answer:

Step-by-step explanation:
the mean is given by:

In our case this is:

side note: the main difference between sample mean and population mean is in the 'context'. However, the method to calculate them is the same.
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
or
.
Answer:
10
Step-by-step explanation:
-80 / -8 = 10
the negatives cancel each other out
Answer:
$110 and $30
Step-by-step explanation:
To solve this, we need to know the total share which is,

Then, you need to know the fraction of the share over the total, such that



So if to find how much that'll be of the $180 for the largest and smallest share,
Largest:

Smallest:

Step-by-step explanation:
the number which is a perfect cube :
125, because 125 = 5³
Answer:
36.7 degrees. A straight line is 180 degrees.
Step-by-step explanation: