A radioactive substance decays exponentially. If 800 grams were present initially and 600 grams are present 100 years later, how many grams will be present after 400 years? Round your answer to two decimal places.
A) 251.93 grams
B) 251.97 grams
C) 252.01 grams
D) 253.13 grams
Correct Answer:
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