<h3>
Answer:</h3>
60 days
<h3>
Explanation:</h3>
Half-life is the amount of time it takes half of a substance to decay away.
Guess and Check
One method for solving half-life problems like this is to guess and check. To do this, we can continue to divide 475mg by 2 until we get to 30mg.
- 475 ÷ 2 = 237.5
- 237.5 ÷ 2 = 118.75
- 118.75 ÷ 2 = 59.375
- 59.375 ÷ 2 = 29.6875
As seen here, it takes approximately 4 half-lives for this sample of Ra-225 to decay to 30mg. Now, we can multiply 4 by the length of the half-life, 15 days.
Fractions
Another way to solve this is to use fractions.
- 16 is equivalent to
.
This means that it takes 4 half-lives for 475mg to decay to 30mg. Using the same method above, we can tell that 4 half-lives are 60 days.
Important Note
In this question, I rounded occasionally. So, not all of the values are exact, but they are all very close.
The method for controlling gaseous emissions is Absorption technique.
<h3>What is
Absorption technique?</h3>
Absorption technique can be used in controlling gaseous emissions by making the Gaseous pollutant to come into co0ntact with a liquid.
Once it comes into a contact with liquid such as water, it will be absorbed and this will turn to soliton which can be disposed carefully without posing hazards to the environment.
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It has to be stated that the subject of a tale virtually manner the message that the author desires to bring in the tale.
<h3>What is a subject?</h3>
Your statistics is incomplete. Therefore, an outline of the query could be given. A subject virtually manner the large message it really is in a tale.
If you need to locate the subject, it is vital that allows you to perceive the plot it really is withinside the tale. It's additionally vital to recognize the manner that which the tale concept characterization and the battle that may be derived withinside the tale.
When those are gotten, the contribution of Billy's attention that he's reliving the day of Tom Harper's dying to the subject of the tale may be derived.
Read more about the characterization :
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Did you forget to put a picture I can’t see the question
Answer:
I believe it should be more righteous
Explanation:
Because always standing above in a higher position suggests superiority
