Final answer:
Both 'more than' and 'over' can be used to describe Carlton's age when he started college, and are both accepted by The Associated Press Stylebook for formal writing.
Step-by-step explanation:
The words that can be used to describe Carlton's age when he started college can depend on the context in which you are writing. In a more conversational tone or informal writing, it would be acceptable to use phrases like 'more than' or 'over' to describe his age. However, when adhering to the standards set by The Associated Press Stylebook, both terms are equally acceptable. It is important to consider the style guide you are following for your writing, as different guides may have different rules regarding numerical expressions and descriptions.