Question

1. the total change in the outdoor temperature over 6 hours was -21°f.

what was the mean change in temperature per hour?
-3.5°f per hour

Explanation:

Step1: Understand the problem

We need to find the mean (average) change per hour. The formula for the mean is $\frac{\text{total change}}{\text{number of hours}}$.

Step2: Substitute the values

The total change is $- 21$°F and the number of hours is $6$. So, we calculate $\frac{-21}{6}$.

Step3: Perform the division

$\frac{-21}{6}=\frac{-21\div3}{6\div3}=\frac{-7}{2}=-3.5$

Answer:

$-3.5$