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Posts: 3,790 | Thanked: 5,718 times | Joined on Mar 2006 @ Vienna, Austria
#576
Originally Posted by anidel View Post
Or well, they might have them in stock already and are playing with them, just for the fun of it.. who knows...
There are X people working for the DDP. These X people need to ship Y devices to members of the community. In order to test the microphones before shipping, each device has to actively call another device and receive a call from one of the other devices.

One test call takes 10 seconds.

a) Express the time (in hours) until delivery starts as a function of X and Y
b) Calculate the phone bill