Original amount 90$ new amount 84.50

Can someone me out here number 4 plz

Find the missing factor. write your answer inexponential form.9^2=9^4×

Match the vocabulary to the proper definition. in probability, two events in which 1. conditional probability the outcome of one event is independent of the outcome of a second event. 2. dependent events in probability, two events in which the outcome of one event is dependent on the outcome of a second event. the probability of an event in which the outcome of the event is conditional on the outcome of one or more different events. 3. independent events