Any program can be an executable, and it can be named anything the user chooses, and would still function exactly the same.
PC games are often run via an executable. If you rename that executable to something else, it will still function perfectly fine.
Therefore, one character long executable programs are just executable programs that have been renamed one character long, and will function as intended.
Answer:
385
Explanation:
There was no question so I simply run the program for you and included the output.
The program seems to calculate: 
Answer:
Yes, because the upper limit is less Than 8 minutes
Explanation:
According to the empirical formula :
68.26% of data lies within 1 standard deviation from the mean;
Hence,
Mean ± 1(standard deviation)
The sample mean and sample standard deviation of the given data is :
Sample mean, xbar = Σx / n = 546 / 100 = 5.46
Sample standard deviation, s = 2.475 (Calculator)
The interval which lies within 68.26% (1 standard deviation is) ;
Lower = (5.460 - 2.475) = 2.985
Upper = (5.460 + 2.475) = 7.935
(2.985 ; 7.935)
Since the interval falls within ; (2.985 ; 7.935) whose upper level is less than 8 means patients will have to wait less Than 8 minutes.
