Final answer:
Lianne traveled a total of 36 floors to get from her office on the 35th floor to the parking lot which is 2 floors below ground level.
Step-by-step explanation:
Lianne works on the 35th floor of an office building, and the parking lot is 2 floors below the ground floor (1st floor). To get back to her car, Lianne first takes the elevator down to the ground floor from the 35th floor, which is 34 floors travel. Then, she goes down two more floors to reach the parking lot.
Therefore, the total number of floors Lianne traveled is 34 (ground floor from 35th) + 2 (to parking lot) = 36 floors.