In the first year of a pyramid scheme, John convinced \(y\) of his friends to pay \(30\) dollars each to join a particular website that he created. Each of those \(y\) friends then convinced another \(y\) people to pay \(15\) dollars each to join the same website. If no one else joined the website that year and each person joined only once, what was the value of \(y?\)

A. The revenue for the website that year was \(\$36,000.\)
B. The first \(y\) friends accounted for \(\dfrac1{25}\) of the total revenue for the website that year.

Answer: D

Source: Veritas Prep