Answer:
2.50 standard deviations above the mean
Step-by-step explanation:
The z-score measures how many a measure is above or below the mean. If the score is positive it is above the mean. If it is negative, it is below. The zscore is given by

In which
is the mean and
is the standard deviation.
In this problem, we have that:

Last year there were 64 inches of snow. How many standard deviations from the mean is that?
This is Z when X = 64. So



So the correct answer is:
2.50 standard deviations above the mean
Answer:
11 units
Step-by-step explanation:
perimeter of triangle ABC = AC+AB+BC
perimeter of triangle = 5 units + 4 units + 2 units
perimeter of triangle = 11 units
Given:
The first four numbers in a pattern are 4, 2, 1, and 0.5.
To find:
The next three numbers in the pattern.
Solution:
We have a pattern,
4, 2, 1, 0.5
Clearly, it is a GP and the common ratio is
because each term is half of its preceding term.
Next term after 0.5 = 
Next term after 0.25 = 
Next term after 0.125 = 
Therefore, the next three numbers in the pattern are 0.25, 0.125 and 0.0625 respectively.
The discriminant of
is 

Negative, no real solutions.
Answer: -24