There will be a 25 grams left after 3240 years.
The half-life of Radium-226 is 1620 years. If we divide 3240 by 1620 the answer is 2. So that means the amount of Radium-226 will divide in half twice.
100 / 2 = 50 / 2 = 25
Answer:
C
Step-by-step explanation:
If You mean A sum to write here's one :
31+3
Answer:

Explanation:
05/10
Simplifying
1/2
or 2^-1
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Answer:
1.35
Step-by-step explanation:
3.24/2.4=1.35