To find which number is a solution of the inequality \( b > 11.3 \), we need to determine which of the provided numbers is greater than 11.3.
- 4: Not greater than 11.3
- 15: Greater than 11.3
- 9: Not greater than 11.3
- –14: Not greater than 11.3
The only number that satisfies the inequality \( b > 11.3 \) is 15.