On a cold night in antarctica. the temperature dropped 0`c to -21c in 6 hours. what is the average temperature change per hour( give me the answer)

-3.5C

Step-by-step explanation:

(-21)-0=-21

First find the Difference in temperatures.

(-21)/6=-3.5

Then Divide by the amount of time passed.

i pretty sure it is

unless if u could do my questions, if not i wouldn't want to