Final answer:
Ms. Dominguez swims at a speed of 3.5 meters per second, calculated by dividing the distance of 210 meters by the time of 60 seconds.
Step-by-step explanation:
To calculate how many meters Ms. Dominguez swims per second, we divide the total distance by the total time. The formula to find the speed is speed = distance/time.
The total distance swum is 210 meters, and the total time taken is 60 seconds. Using the formula:
- Speed = 210 meters / 60 seconds
- Speed = 3.5 meters/second
So, the correct answer is A. 3.5 m/s.