Messages arrive to a computer server according to a Poisson distribution with a mean rate of 10

Question:

Messages arrive to a computer server according to a Poisson with a mean rate of 10 per hour. Determine the length of an interval of time such that the probability that no messages arrive during this interval is 0.90. 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...