Ellie opened a savings account and deposited $200.00 as principal. The account earns 7% interest, compounded continuously. Write a function that describes the situation.
What is the balance in the account after 10 years?

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! "?