From 2005 through 2014, the number of music CDs sold in the United States declined each year by approximately 15% of the number sold the preceding year. In 2005, approximately 600 million CDs were sold in the United States. Of the following, which best models C, the number of millions of CDs sold in the United States, t years after 2005?

Immanuel purchased a certain rare coin on January 1. The function f(x) = 65(1.03) x , where 0 ≤ x ≤ 10, gives the predicted value, in dollars, of the rare coin x years after Immanuel purchased it. What is the best interpretation of the statement 'f(8) is approximately equal to 82' in this context?