Answer: 19.77%
Step-by-step explanation:
Given: Mean : 
Standard deviation : 
The formula to calculate z-score is given by :_

For x= 80, we have

The P-value = 
In percent , 
Hence, the approximate percentage of the test scores during the past year exceeded 80 =19.77%
Answer:
x - 5
Step-by-step explanation:
Let the input be x
Therefore, output = x - 5
Answer:

Step-by-step explanation:
The given parameters can be represented as:


Required
The total yards
This is calculated as:


Convert fraction to decimal


Answer:
16.6
Step-by-step explanation:
50/3 = 16.6