# How do you know if a word problem is talking about exponential functions?

##### 1 Answer

May 18, 2015

Example:

John tells you a secret. You see no harm in telling Bob and Rob .

After this, 4 people know the secret (John, you Bob and Rob). Suppose that both Bob and Rob decide to tell the secret to two new people.

After the third "round" of indiscretion, eight people will know the secret.

If this pattern of spreading the secret continues, how many people will know the secret after 10 such "rounds"?