Answer: To find the time it takes for the baby to crawl down the hallway, we can use the formula: time = distance / speed Given that the distance of the hallway is 3.72m and the baby crawls at a constant speed of 0.15 m/s, we can substitute these values into the formula: time = 3.72m / 0.15 m/s Simplifying this calculation, we have: time = 24.8 seconds Therefore, it takes the baby approximately 24.8 seconds to crawl down the hallway at a constant speed of 0.15 m/s.