Final answer:
The total distance traveled by the end of the 5th day is 70.33 kilometers.
Step-by-step explanation:
To find the total distance Cecelia has traveled by the end of the 5th day, we need to calculate the distance walked each day and sum them up.
Given that she walked 27 kilometers on the first day, we can calculate the distances for the subsequent days:
Day 2: 2/3 * 27 = 18 kilometers
Day 3: 2/3 * 18 = 12 kilometers
Day 4: 2/3 * 12 = 8 kilometers
Day 5: 2/3 * 8 = 5.33 kilometers
Adding up the distances for all five days, the total distance traveled by the end of the 5th day is 27 + 18 + 12 + 8 + 5.33 = 70.33 kilometers.