Final answer:
Sara's rate of speed is 2.09 feet per hour, calculated by dividing the distance traveled, 23 feet, by the time taken, 11 hours.
Step-by-step explanation:
Sara's rate of speed can be calculated by dividing the total distance traveled by the time taken to travel that distance. In this case, Sara travels 23 feet in 11 hours.
To calculate the rate of speed, we use the formula:
Speed = Distance ÷ Time
Plugging in the values:
Speed = 23 feet ÷ 11 hours = 2.09 feet per hour
Therefore, Sara's rate of speed is 2.09 feet per hour.