The parade lasts for three hours. You have been asked to calculate how fast a single servers must be to so that there will be an average of two people in line. Due to other people in the booth getting in the way and frequent breaks to say hello to passing friends, the server's time varies by plus or minus a minute. Highlight the average length of time that each type of customer waits. There are hawks and mice.
Hawks have no natural predators.
The surviving hawks and mice from the previous month multiply with some birth rate. Each month some hawks and mice die natural deaths at some death rate. The sole source of food for the hawks is mice. Each month each hawk must eat a certain amount of mice in order to survive. Hawks and mice that can not eat enough die of starvation.