Answer ITll take an obtusue from.
Step-by-step explanation:
240 days is 4 times the half-life, which means that a sample of 1000 mg will decay to

after 240 days.
Answer: B. The United States might not have been able to stop the attacks, but it could have made a better effort to do so.
Step-by-step explanation:
Answer:
Yes
Step-by-step explanation:
Hope this helps!
Good Luck!