Final answer:
To find Tiana's final number, we consider her displacements and distances. The displacement is 0 km, while the total distance she jogged is 4.6 km.
Step-by-step explanation:
To find Tiana's final number, we need to consider the displacements and distances she jogged. In the original direction, she jogged 1.5 km and then jogged in the opposite direction for 2.4 km. Finally, she turned back and jogged 0.7 km in the original direction again.
The displacement is the straight-line distance between the starting point and the final point, regardless of the path taken. In this case, since Tiana returned to the starting point, the displacement is 0 km.
The distance is the total length of the path traveled. Tiana jogged 1.5 km in the original direction, then another 2.4 km in the opposite direction, and finally 0.7 km in the original direction again. So the total distance she jogged is 1.5 km + 2.4 km + 0.7 km = 4.6 km.