Solve.The radioactive decay of radium 226 can be described by the equation 
where C is the original amount of radium and A is the amount of radium remaining after t years. If 23 milligrams of radium are sealed in a container now, how much radium will be in the container after 100 years. Round to the nearest thousandth.
A. 22.99 mg
B. 24.006 mg
C. 1.194 mg
D. 22.037 mg
Answer: D
Mathematics
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A. 
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