Final answer:
Keri walks approximately 4.29 kilometers in one week.
Step-by-step explanation:
Keri walks her dog every morning. On weekdays, the length of the walk is 0.55 km. On weekends, the walk is 1.4 times as long as a walk on a weekday. To find out how many kilometers Keri walks in one week, we need to calculate the total distance she walks on weekdays and weekends.
Distance walked on weekdays = 0.55 km per day
Distance walked on weekends = 1.4 * 0.55 km per day = 0.77 km per day
Total distance walked in one week = (distance on weekdays * number of weekdays) + (distance on weekends * number of weekends)
Since there are 5 weekdays and 2 weekend days in a week, we can calculate the total distance:
Total distance walked in one week = (0.55 km * 5) + (0.77 km * 2) = 2.75 km + 1.54 km = 4.29 km
Keri walks approximately 4.29 kilometers in one week.