10(14-6) what is value of expression

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

The volume of a cube-shaped shipping container is 13,824 cubic inches. find the edge length of the shipping container.

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.