Please answer asap!
A bank manager wants to encourage new customers to open accounts with principals of at least $3 comma 500. He decides to make a poster advertising a simple interest rate of 3%. What must the principal be if the bank manager also wants to advertise that one can earn $10 the first month? Can the poster correctly say, "Open an account of $3 comma 500 and earn at least $10 interest in 1 month!"?