Answer:
2.15miles
Step-by-step explanation:
The total distance traveled by Martina is the sum of the length of path of her travel. Distance is a scalar which has only magnitude but no directional attribute.
Total distance = Office - school + school - library + library - friend's house + friend's house - house
Now insert the given parameters:
Total distance = 1mile + 0.5mile + 0.25mile + 0.4mile = 2.15miles
Total distance is 2.15miles