Jane writes a chain email and sends it to five friends. Assume each person reads the email and, within five minutes of the email arriving, sends it to five other people who have not received it yet. Show with calculations why at least 156 people including Jane will have read the email within fifteen minutes of Jane sending it.
Mathbot Says...
I wasn't able to parse your question, but the HE.NET team is hard at work making me smarter.