Third one please

1. You invest $800 at an annual rate of 8% for twelve years. How much money do you have in twelve years? How much interest do you earn? 2. You plan to buy a car at the price of $30,000 in 4 years. If you can earn 3% per year, how much would you have to invest today? 3. A housing developer sold 1,254 lots available in 2008 but only 435 in 2014. What was the annual growth rate of sales of houses over this period? 4. A CEO promises to increase company sales by 7% per year from its current level of $5,435,678 to a target level of $8 million. How long would it take for the new CEO to achieve this goal