### Step-by-Step Solution:
1. Identify the Function Domain and Variable Constraint:
- The track team is purchasing jerseys, and the number of jerseys purchased is denoted by [tex]\( n \)[/tex].
- According to the given condition, if they buy more than 25 jerseys, the cost is [tex]$12.99 each.
2. Analyze the Function and Constraint:
- The total cost function is given as:
\[
C(n) = 12.99 \times n
\]
- For the cost condition of $[/tex]12.99 per jersey to apply, the team must purchase more than 25 jerseys.
3. Define the Domain:
- The constraint specifies that the number of jerseys purchased [tex]\( n \)[/tex] must be more than 25.
- Therefore, the minimum number of jerseys they can purchase to qualify for the [tex]$12.99 price per jersey is 26, as the track team must purchase one more than 25.
4. Conclusion:
- The domain of this function is therefore restricted to numbers greater than 25.
### Completed Statements:
1. The domain of this function is first restricted to:
\(\boxed{\text{one more than the number of jerseys}}~25\)
2. The domain is restricted to numbers greater than 25 because the track team:
\(\boxed{\text{must buy more than 25 in order to get the price of } \$[/tex]12.99 \text{ each.}}\)
Thus, the correct restriction on the domain based on the provided information is:
[tex]\[
\boxed{26}
\][/tex]
