Can the fraction 12/27 be reduced

Geometry paper. i don't know how to do the rest. questions 5. 8. 9. and 10.

What is the square root of 45? (step by step working plz)

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