Mimosa pudica or "makahiya" leaves droop and fold inward to defend itself from predators. It is known that the time to go return to its natural form follows the exponential distribution with a mean of...

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Extracted text: Mimosa pudica or "makahiya" leaves droop and fold inward to defend itself from predators. It is known that the time to go return to its natural form follows the exponential distribution with a mean of 9 minutes. Determine the failure rate.