The time between arrivals of small aircraft at a county airport is exponentially distributed with a mean of one hour. Round the answers to 3 decimal places. a) What is the probability that more than three aircraft arrive within an hour? b) If 30 separate one-hour intervals are chosen, what is the probability that no interval contains more than three arrivals? c) Determine the length of an interval of time (in hours) such that the probability that no arrivals occur during the interval is 0.21.

Short No
One of the ways you can answer this question is to graph both of the functions. You already have the graph of one of them. I've made the other one for you.

They don't look very much alike, do they? 

You are asked for the ranges. The range of your graph is  ∞ > y ≥ 1 which includes all the reals within that boundary. 

The value of the range of the absolute value graph is ∞ > y ≥ 1 which includes all the reals within that boundary. 

The graphs are not the same but the ranges are the same are the same <<< answer.