The time to failure (in hours) for a laser in a cytometry machine is modeled by an exponential distribution with the answers to 3 decimal places. (a) What is the probability that the laser will last at least 20675 hours? (b) What is the probability that the laser will last at most 30974 hours? i (c) What is the probability that the laser will last between 20675 and 30974 hours? * = 0.00004. Round

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