I believe its C. 3 & 3/4 I hope this helps:)
The formula for A = Ao (1/2) ^ t/h
So sub in.
100 = 800 (1/2) ^ 639,000/?
That's all i can do lol
Answer:

Step-by-step explanation:

Hope this helps!
The answer on how to simplify question is A. 2w^2+18w
Answer:
4:1
Step-by-step explanation:
A is basically 4 times bigger than B