Final answer:
The average change in the creek's water level is -7.25 feet per hour, calculated by dividing the total change of -4 7/10 feet by the total time of 2 hours.
Step-by-step explanation:
To find the average change in the creek's water level per hour, we can divide the total change in the water level by the total time the change occurred over. The creek's water level changes by −4 7/10 feet in 2 hours. To express this as an improper fraction, −4 7/10 is the same as −28/10 or −29/10 feet.
To find the average change per hour, we perform the following calculation:
- Average change per hour = Total change / Total time
- Average change per hour = (−29/10) feet / 2 hours
- Average change per hour = −14.5 feet / 2 hours
- Average change per hour = −7.25 feet per hour
So, the average change in the creek's water level is −7.25 feet per hour.