Waiting times to receive food after placing an order at the local Subway sandwich shop follow an

Question:

Waiting times to receive food after placing an order at the local Subway sandwich shop follow an exponential with a mean of 60 seconds. Calculate the probability a customer waits:
a. Less than 30 seconds.
b. More than 120 seconds.
c. Between 45 and 75 seconds.
d. Fifty percent of the patrons wait less than how many seconds? What is the median?

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...