<span>You would have to wait 318 years for 1/5 (20%) of the Radium to disappear. 1590 is the point where half of the Radium would decay, so if you take 20% of that, it would equate out to 318 years. Radium has a long half life!</span>
Answer:
42/100. Simplified would be 21/50]
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
it's In the picture
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Answer:
The sum of two even numbers is even and greater than the addends.
Step-by-step explanation:
Let 2n and 2m be two even numbers.
The sum of these numbers is

Use distributive property:

This number is even because 2 is its factor.
Note that

Thus, correct option is:
The sum of two even numbers is even and greater than the addends.
Answer:
60
Step-by-step explanation:
That is the answer. Hope that helps