Answer:
B
Step-by-step explanation:
7x-4 is two times 2.5x+4
Answer:
x=8
Step-by-step explanation:
Answer:
r=32/7
Step-by-step explanation:
Answer: 0.4302
Step-by-step explanation:
Given : Mean : 
Standard deviation : 
Sample size : 
Also, these distances are normally distributed.
Then , the formula to calculate the z-score is given by :-

For x=32.5

For x=40.5

The p-value = 

Hence, the required probability :-0.4302