Answer:
here is no question sorry
 
        
             
        
        
        
Answer:
1. 68%
2. 50% 
3. 15/100
Step-by-step explanation:
Here, we want to use the empirical rule 
1. % waiting between 15 and 25 minutes 
From what we have in the question;
15 is 1 SD below the mean 
25 is 1 SD above the mean 
So practically, we want to calculate the percentage between;
1 SD below and above the mean 
According to the empirical rule;
1 SD above the mean we have 34%
1 SD below, we have 34%
So between 1 SD below and above, we have 
34 + 34 = 68%
2. Percentage above the mean 
Mathematically, the percentage above the mean according to the empirical rule for the normal distribution is 50%
3. Probability that someone waits less than 5 minutes 
Less than 5 minutes is 3 SD below the mean
That is 0.15% according to the empirical rule and the probability is 15/100 
 
        
             
        
        
        
I believe the answer is 9, because 1/3 is .33 so 33%. so 33% is equal to 3 buttons and add another 66% which would be another 6 buttons would add up to 99% in all. after that I don't think they would add a quarter of a button.