You were told that a certain cash flow sequence started at $3000 in year 1 and increased by $2000 each year. How many years were required for the equivalent amount worth of sequence to be $12000 at an interest rate of 10% per year? You were told that a certain cash flow sequence started at $3000 in year 1 and increased by $2000 each year. How many years were required for the equivalent amount worth of sequence to be $12000 at an interest rate of 10% per year?