After your grandmother retired, she purchased an annuity contract for $235,000 that will pay her $20,000 at the end of every year untilishe dies. The appropriate interest rate for this annuity is 4.5%. The number of years that your grandmother must live in order to get more value out of the annuity than what she paid for it is closest to: 1. Click to open 2. Click to open: 17 10 16