Final answer:
To determine when an $85 baseball card will reach $250 in value with a 6.5% yearly increase, use the compound interest formula. It will take approximately 14.2 years for the card to be worth $250.
Step-by-step explanation:
To find out when a collectible baseball
card worth $85 today will be worth $250 with an annual increase in value of 6.5%, we can use the formula for compound interest:
P = P0 * (1 + r)^n
Where:
P
is the future value of the card
P0
is the present value of the card
r
is the annual interest rate (expressed as a decimal)
n
is the number of years
Substituting the given values in the formula:
250 = 85 * (1 + 0.065)^n
To find
n
, we need to rearrange the formula and solve for
n
:
n = log(250/85) / log(1.065)
Calculating this gives:n ≈ 14.20
Therefore, it will take approximately 14.2 years for the baseball card to be worth $250. Since part-years cannot be accounted for in full years, you would round up to the next whole year if you're looking for the card to reach at least $250 in value.