Answer: 8.3 meters per second.
Step-by-step explanation:
Given : A hot air balloon descended 99.6 meters in 12 seconds.
then, the average rate of descent is given by :-
[tex]\text{Average rate of descent}=\dfrac{\text{\text{Distance descended }}}{\text{Time}}\\\\\Rightarrow\ \text{Average rate of descent}=\dfrac{99.6}{12}\\\\\Rightarrow\ \text{Average rate of descent}=8.3[/tex]
Therefore, the balloon's average rate of descent in meters per second = 8.3 meters per second.
