Answer:
To find the total distance Lydia walks each week, we need to convert the distance to the library from meters to kilometers and then add up the distance she walks to and from the school and library.
Distance to school = 827 meters
Distance to library = 1.4 kilometers = 1400 meters
Total distance walked to and from school in one day = 2 x distance to school = 2 x 827 = 1654 meters
Total distance walked to and from school in one week (5 days) = 5 x 1654 = 8270 meters
Total distance walked to and from library in one day = 2 x distance to library = 2 x 1400 = 2800 meters
Total distance walked to and from library in one week (1 day) = 1 x 2800 = 2800 meters
Total distance Lydia walks each week = distance to school + distance to library = 8270 + 2800 = 11070 meters
To convert meters to kilometers, we divide by 1000:
Total distance Lydia walks each week = 11070 meters ÷ 1000 = 11.07 kilometers
Therefore, Lydia walks a total of 11.07 kilometers to and from school and library each week.