To determine how many more miles Trey must run to complete the race, we need to know the total distance of the race. However, the information you provided only mentions that he has completed 14 of the race but does not specify the total distance of the race.
Assuming "14" refers to a total of 14 miles for the race:
- Total distance of the race = 14 miles
- Miles already run = 1.2 miles
- Miles left to run = Total distance - Miles already run = 14 miles - 1.2 miles = 12.8 miles.
Since none of the answer choices match this calculation, there might be a confusion regarding what "completed 14 of the race" signifies.
If "completed 14 of the race" means something else, please clarify. Otherwise, based on a standard assumption of a 14-mile race, he has 12.8 miles left to run.