You started saving for a car when you were in middle school. you have done some research and discovered that it will cost you about $15,000 for a used car that would fit your needs. you were encouraged to invest some of your savings to you get to your financial goal faster. so far you have saved $10,000. if you invest this money in a savings account with a 3% interest rate compounded annually, how long will it take to earn enough money to go purchase the car? use the compound interest formula a = p (1 + i)n, where a is the accumulated amount, p is the principal, i is the interest rate per year, and n is the number of years. round your final answer to the nearest tenth