What is the simplified form of -9m^-2n^5 x 2m^-3n^-6

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

What is the difference between the predicted value and the actual value

Askateboard ramp is in the shape of a right triangle what is the height of the ramp