Solve the problem.After introducing an inhibitor into a culture of luminescent bacteria, a scientist monitors the luminosity produced by the culture. Use a graphing utility to fit a logarithmic function to the data. Round values to the nearest hundredth. Then, use the function to predict the luminosity, to the nearest hundredth, after 20 hours. 
A. y = 100.5 - 32.7 ln x; 2.54
B. y = 98.75 - 32.66 ln x; 0.91
C. y = 107.55 - 41 ln x; -15.27
D. y = 112.97 - 45.97 ln x; -24.74
Answer: B
Mathematics
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Solve the problem.An investment is worth $2153 in 1992. By 1996 it has grown to $3881. Let y be the value of the investment in the year x, where x = 0 represents 1992. Write a linear equation that models the value of the investment in the year x.
A. y = 432x + 2153
B. y = -432x + 5609
C. y = 
x + 2153
D. y = -432x + 2153
Mathematics
Determine the sum or difference in clock 12 arithmetic.(12 + 7) + 12
A. 8 B. 3 C. 7 D. 31
Mathematics
Perform the indicated operations.41 - (-44)
A. 85 B. 3 C. -3 D. -85
Mathematics
Find the specified extreme value on the given region.
Minimum of 7x + 3y
A. 36 B. 24 C. 16 D. 0
Mathematics