Answer:
C). 0.39 grams
Step-by-step explanation:
First find how many half-lifes are in 3 hours:
3 hours ÷ 20 minutes = 9 half-lifes
Find the total left:
0.5^9*200 ≈ 0.39
Hey, I think an image is needed to answer this question.
Answer:
Wat the heck?
Step-by-step explanation:
Is this hw cus I feel bad for ya!
The answer to your problem is 108.18