Your grandmother tells you a story about a gente that offers two options for rewards. Option 1: $1,500,000
Option 2: A magical $1 coin that triples every day. The coin turns into three coins on the first day
The three coins turn into nine coins on the second day. The nine coins triple to 27 coins on the
third day. This doubling will continue for 28 days.

Write an equation that shows the number of coins n that you get when you choose option 2 after d days.

Which option would you chose?