Engineers observe that about 90% of graphite samples fracture within five hours when subjected to a certain

Question:

Engineers observe that about 90% of graphite samples fracture within five hours when subjected to a certain stress.
(a) If the time to fracture is modeled with an exponential distribution, what would be a suitable value for the parameter A?
(b) Use the model to estimate the probability that a fracture occurs within three hours
Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Question Posted: