Final answer:
Homer's walking time depends on the distance he walked, which is not provided in the question.
Step-by-step explanation:
Homer walked to school at a pace of 4 miles per hour. In order to determine how many hours it took him to walk, we can use the formula:
Time = Distance / Speed
The distance Homer walked is not given in the question, so we cannot determine the exact time it took him. However, if you have the distance, you can divide it by the speed of 4 miles per hour to find the time in hours.