Investments Instead of investing in the stock market, many people invest in collectibles, like baseball cards. Each year, Anna uses some of the money she receives for her birthday to buy one special baseball card. For the last four birthdays, she purchased cards for $6, $18, $24, and $18. The current value of these cards is modeled by
where x represents the average rate of return plus one.
a. If the cards are worth $81.58, write an equation to model this situation.
b. Find the value of x.
c. What is the average rate of return on Anna's investments?