Solve the problem.In a chemical reaction, the rate at which the amount of a reactant changes with time is proportional to the amount present, such that 
, when t is measured in hours. If there are 
of reactant present when t = 0, how many grams will be left after 
? Give your answer to the nearest tenth of a gram.
A. 2.2 g
B. 6.7 g
C. 4.5 g
D. 0.1 g
Answer: C
Mathematics
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Mathematics