The graph below shows data regarding radioactive decay of carbon-14. If decay continues to occur normally, how much C-14 will remain after 22,800 years? 
Definitions:
Perichondrium
Double-layered connective tissue sheath surrounding cartilage.
Connective Tissue
A type of body tissue that supports, binds together, and protects the organs and other tissues of the body.
Cartilage
A firm, elastic type of connective tissue found in many areas in the bodies of humans and other animals.
Hyaline Cartilage
A type of cartilage that is translucent and appears glass-like, found in areas such as the nose, trachea, and at the ends of long bones, where it reduces friction and absorbs shock.
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