Answer:
Step-by-step explanation:
The time it takes for a sound wave to travel a certain distance can be calculated using the formula:
time = distance / speed
In this case, the distance is 9,000 m and the speed of sound in water is 1,500 m/s. Substituting these values into the formula, we get:
time = 9,000 m / 1,500 m/s = 6 seconds
Therefore, it would take a sound wave 6 seconds to travel 9,000 m in water at an average speed of 1,500 m/s.