Eva maria borrowed money from her father and agreed to pay him 4% simple annual interest. at the end of 7 years, eva maria owes $1736 in interest. what amount did eva maria borrow from her father?

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