Crusty's pizza oven has been very reliable with a mean time between failures of 45 days (assume the failures follow an exponential distribution).

What is the probability of a failure in the next 42 days?

0.00

0.61

0.39

0.92

What is the probability that it will be 52 days or longer before the pizza oven experiences a failure?

0.83

0.17

0.69

0.31