Find an equation for the nth term of the arithmetic sequence. -20, -16, -12, -8, ... (2 points)

an = -20 x 4(n - 1)
an = -20 + 4(n - 1)
an = -20 + 4(n + 2)
an = -20 + 4(n + 1)

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! "?