Answer:
B. 390 Miles.
Explanation:
We're given that Justine travels 20 miles one way to her company's main office every week from Monday to Thursday. On Friday, she travels 50 miles to her company's regional office.
Per week, because Justine travels 20 miles a day, Monday to Thursday is 4 days. To figure this out, we would simply need to divide.


On Friday, adding on the 50 miles:


Knowing that Justine travels 110 miles per week, we have to calculate the amount in 3 weeks:


Therefore, Justine traveled 390 miles.
Thanks.