Final answer:
Cleone traveled a total of 90 miles for the round trip to her sister's house and back.
Step-by-step explanation:
To solve how many total miles Cleone traveled to her sister's house and back, we simply need to add the distance of the trip to the sister's house with the distance of the return trip. Cleone traveled 45 miles to her sister's house, and since the trip back home is the same distance, the return trip is also 45 miles. Therefore, the total distance traveled is:
Distance to sister's house + Distance back home = Total distance traveled
45 miles + 45 miles = 90 miles
Cleone traveled a total of 90 miles for the round trip to her sister's house and back.