Measure the amount of certain radioactive elements in the rock when rocks are formed, small amounts of radioactive elements usually get included as the rock ages, more and more of the uranium changes into lead.
My dad if this doesn’t help
Try common ratio, because b represents a constant variable. (I’m not 100% but it may be this)
That is The Board of Geographical Names. It was established in the late nineteenth century and is operated by the U.S. Geological Survey. They are the final arbiter of names on U.S. maps.
The processes of extracting and separating gold in remote regions often result in environmental contamination with Cyanide (Option B).
<h3>What is cyanide?</h3>
Cyanide is a substance that contains a group formed by Carbon and Nitrogen forming a strong chemical bond (C≡N).
Cyanide can be very toxic when forms soluble salts (e.g., sodium and/or potassium cyanide).
Cyanide was used as a chemical compound during gold extraction, thereby generating environmental contamination.
Learn more about cyanide contamination here:
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