An average of 125 packets of information per minute arrive at an internet router. it takes an average of .002 second to process a packet of information. the router is designed to have a limited buffer to store waiting messages. any message that arrives when the buffer is full is lost to the system. assuming that interarrival and service times are exponentially distributed, how big a buffer size is needed to ensure that at most 1 in a million messages is lost?

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )

Write checks carefully, keep and accurate record of checks, and deposits made.