The life оf а semicоnductоr lаser is аn exponential random variable with an expected value equal to 150 hours. The laser has not yet failed after [a] hours. This copywritten question is part of a quiz or exam at Arizona State. It may not be posted or reproduced without the permission of the author, Dr. L. Chattin, and Arizona State University. The probability that the life of the laser will exceed [x] hours is __________. Express your answer to four decimal places.