Answer:
423.9
Step-by-step explanation:
Area 1 = 3.14 (16²) = 803.84
Area 2 = 3.14 (11²) = 379.94
803.84 - 379.94 = 423.9
The half-life of the radioactive substance can be determined through teh equation ln 2 = k (t 1/2) where k is equal to ln (1/(1-0.58)) / 3. Hence t 1/2 is equal to 2.40 days. To decay to 10% of the original amount, ln (1/0.90) / ( ln2) / 2.40, time is equal to 0.37 days.
Answer:
finish the sentence
Step-by-step explanation:
Answer: The answer B
Step-by-step explanation: so the answer i got was x 5 so its B
