Answer: x = 12
Step-by-step explanation:
Answer:
5y-6
Step-by-step explanation:
Answer: 16
Step-by-step explanation:
Given : Mean : 
Standard deviation : 
The value of z-score is given by :-

For x= 115

The p-value : 
Now, the number of people smarter than Many is given by :_

Hence, there are 16 members smarter than Mandy.
Answer:
She spent 2 and a half hours doing extra work.