Answer:
4 : 2: 1
Step-by-step explanation:

You have to add the last number to itself. So the next number would be 32 because 16 + 16 equals 32. Then you add 32 + 32 so the next number would be 64
1, 2, 4, 8, 16, 32, 64, 128
Answer: sorry the answer is not clear.
Step-by-step explanation:
7.8 or if you are rounding it’s eight