Dale invests $500 in an account that pays 6% simple interest. How much more could he have earned over a thirty year period if the interest had compounded annually? A. $1,471.75 B. $2,256.12 C. $1,621.25 D. $1,804.12 Please show calculations . Thirty years ago, your father invested $6,000. Today that investment is worth $67,270.98. What is the average rate of return your father earned on this investment? A. 11.67% B. 8.44% C. 10.23% D. 8.39% Please show calculations