To find out how much the temperature changed each hour, we need to calculate the temperature change per hour. We can do this by finding the difference between the initial temperature and the final temperature, and then dividing it by the number of hours.
In this case, the initial temperature at noon is 70 degrees Fahrenheit and the final temperature at 5:00 P.M. is 58 degrees Fahrenheit. The time interval between noon and 5:00 P.M. is 5 hours.
So, to find the temperature change per hour, we can use the formula:
Temperature change per hour = (Final temperature - Initial temperature) / Number of hours
Temperature change per hour = (58°F - 70°F) / 5 hours
Temperature change per hour = -12°F / 5 hours
Now we can simplify this:
Temperature change per hour = -2.4°F / hour
Therefore, the temperature is dropping by approximately 2.4 degrees Fahrenheit per hour.