On Monday, Trey travels 40 miles (40 mph x 1 hour).
On Tuesday, Trey travels 40 miles (20 mph x 2 hours).
On Wednesday, Trey travels 30 miles (60 mph x 0.5 hours).
On Thursday, Trey travels 40 miles (10 mph x 4 hours).
Therefore, Trey traveled:
- 40 miles on Monday
- 40 miles on Tuesday
- 30 miles on Wednesday
- 40 miles on Thursday
In total, Trey traveled 150 miles.