1. What is the youngest age a widow with no children can start receiving monthly benefits from her deceased husband's social security?
2. Gordon estimates that he will need approximately $1,300,000 in 40 years for his retirement years. If he can earn 8 percent annually about how much does he need to save per year?
3. Suppose that a loan is being repaid with 20 annual payments with the first payment coming one year from now. The first 5 payments are for $230, the next 8 are $300 each, and the final 7 are $400 each. If the effective rate of interest is 6.9%, how much interest is in the 11th payment?