Answer:
Step-by-step explanation:
We have to write 243 as a power of some number.
So, if we factorize 243 we get,
243 = 3 × 3 × 3 × 3 × 3
Therefore, we can write 243 as a power of 3.
No other number can be written in powers of 243 because it do not contain any other factor than 3.
Hence, 243 can be written as :

8: 20
9: 90
I am so sorry if this is wrong. I am not good at this type of things
Answer:
I believe the answer i B
Step-by-step explanation:
I'm not 100% sure so please correct me if im wrong, sorry if i am
8 is 6.2
9 is 7
The pattern here is +0.8.
4.6 - 3.8=0.8
5.4-4.6=0.8, and so on
Answer is 8 liters
Reason
1 to 4 is the same as 2 to 8
So 2 concentrate to 8 water