To determine how many more miles Trey must run to complete the race, we first need to know the total distance of the race. Since it is not explicitly stated in the problem, we will consider that "14 of the race" means that the total distance of the race is 14 miles.
Trey has already run 1.2 miles. Therefore, we can calculate the remaining distance he needs to run as follows:
Total distance of the race: 14 miles Distance already run: 1.2 miles
Remaining distance = Total distance - Distance already run
Remaining distance = 14 miles - 1.2 miles = 12.8 miles
However, if the responses provided in the options provided are focused on smaller segments or partial distances, we need to adjust to see if any of those make sense.
None of the provided response options (5.2 miles, 3.6 miles, 0.3 miles, 1.6 miles) equals 12.8 miles. This indicates there might be a misunderstanding or different context for the total distance. Please verify the total distance of the race.
Assuming the race is 14 miles: Trey has to run 12.8 more miles to complete the race, which isn't an option provided, requiring context on the race distance, or errors in the problem setup.
If you verify the race length is only 14 miles, quantify with the additional details or values.