Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 750e-0.033t, where t is the time in years? Round to the nearest hundredth.
A. 221.61 yr
B. 200.61 yr
C. 24.75 yr
D. 21.00 yr
Answer: D
Mathematics
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A. 
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D. 
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