What is the largest integer that is below square root of 13?

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

If u good at math hit me up on insta or sum @basic_jaiden or @ and