The answer is C 4.29 kilometers.
First, multiply 0.55 × 5 = 2.75
( we multiply by 5 because there are 5 days in a week )
Then, we multiply 0.55 × 1.4 = 0.77
( we multiply by 1.4 because it said 1.4 times as the weekdays )
After that, we take 0.77 and multiply it by 2, like this 0.77 × 2 = 1.54
( we multiply by 2 because there are 2 days in the weekend )
Finally, we add 1.54 + 2.75 = 4.29
That's how you get your answer C 4.29 kilometers
Hope this helps!!