Answer:
16.2
Step-by-step explanation:
By geometric mean theorem:

Each element is 2/3 times the previous one, so that's a geometric sequence.
6×(2/3)=4, 4×(2/3)=8/3, 8/3×(2/3)=16/9, 16/9×(2/3)=32/27
Answer: 6, 4, 8/3, 16/9, 32/27
It hase to be le letter c
Id say 40%
because 8 are math so 9 of them are other