Question

You invest $ 1 in a mutual fund. Every 8 years, your money doubles. If you don't add more money, the expression that shows your investment worth after 48 years is

1. 1⁴⁸
2. 1 × 2 × 2 × 2 × 2 × 2
3. 1 + 2 + 2 + 2 + 2 + 2 + 2
4. 1 × 2 × 2 × 2 × 2 × 2 × 2