Solution: The correct option is d. 8.75
<u>Explanation:</u>
The formula for variance is:

First we need to find the mean
of the given data:

Now let's find
, please have a look at the attached picture:

Answer:
Altitude
Step-by-step explanation:
An altitude of a triangle always extends from a vertex to the opposite base (side) of the triangle, and it is always at a right angle. It is also known as the "height".
The answer is the last one
I think the answer to this question is 18
Hello, we need to see it as a difference of two squares as we know that for all a and b real numbers

So, here

Voila !
Thank you