Final answer:
The value of Sam's baseball card has increased by approximately $1.5321.
Step-by-step explanation:
To find out how much Sam's baseball card has increased in value, we need to solve the equation b + 0.62b = 2.48. Combining like terms, we get 1.62b = 2.48. We can then divide both sides of the equation by 1.62 to solve for b, which gives us b ≈ 1.5321. Therefore, the value of Sam's baseball card has increased by approximately $1.5321.