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 30 hours and obtains the following data. Use a graphing utility to fit an exponential function to the data. Round the values to the nearest thousandth. Then, use the function to predict the amount of material, rounded to the nearest tenth, remaining at 40 hours. 
.
A. y = 99.671e-0.077x, 6.7 mg
B. y = 99.671e0.926x, 1.2 mg
C. y = 99.671e0.077x, 2168.7 mg
D. y = 99.671e-0.077x, 4.6 mg
Answer: D
Mathematics
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A. 12 B. 60 C. 64 D. 0
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Test the vector field F to determine if it is conservative.F = 
i + 
j + 
k
A. Not conservative B. Conservative
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Write the number in scientific notation.0.000348
A. 3.48 × 10-5 B. 3.48 × 10-4 C. 3.48 × 104 D. 3.48 × 10-3
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Solve the inequality. Express your answer using interval notation. Graph the solution set.|4k + 8| - 8 < -5
A. (-?, - 
)
B. (- 
, - 
)
C. (-?, - 
)
D. (-?, - 
) ? (- 
, ?)
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