Solve the problem.A nuclear scientist has a sample of 
of a radioactive material which has a half-life in hours. She monitors the amount of radioactive material over a period of a day and obtains the following data. Use a graphing utility to fit an exponential function to the data. Predict the amount of material remaining at 40 hours.
.
A. y = 86e-0.071x, 5.0 mg
B. y = 100e-0.077x, 4.6 mg
C. y = 92e-0.0686x, 5.9 mg
D. y = 100e-0.077x, 6.7 mg
Answer: B
Mathematics
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