“Win-Fu” Response: The average human heart beat is 60 to 80 beats per minutes; athletes have much lower heart beats, around 50 BPM. Divide 60 by 80 and then subtract 50 and you will find the answer.
Example: “What is Customer Retention?”
“Win-Fu”: We know where the business is going. Currently, an IP address is formatted like this: 110XXXXX, with a max possible number of hosts of 28 - 2 = 254. In the future, and IP address will look like 0XXXXXXX, which can create a possible number of hosts of 224 - 2 = 16,777,214. Soon soup cans in the store with have their own IP addresses. This is what customer retention means.