Nadia is a stockbroker she earns 14% commission each week last week she sold $6,400 worth of stocks how much did she make last week in commission if she averages the same amount each week how much did she make in commission last week

Abank manager wants to encourage new customers to open accounts with principals of at least $2,500. 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 $2 comma 500 and earn at least $10 interest in 1 month! "?