Final answer:
The symbol used for a non-owned auto under a Business Automobile policy is typically represented as "symbol 7" or "symbol 9".
Step-by-step explanation:
The symbol used for a non-owned auto under a Business Automobile policy is typically shown as "symbol 7" or "symbol 9". Symbol 7 represents specifically named individuals who may use non-owned autos for business purposes, while symbol 9 represents any employee while using non-owned autos for business purposes.