Use a graphing utility to graph the function below. Be sure to include at least two full periods.
A. 
B. 
C. 
D. 
E. 
Answer: B
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Find the domain and range of the inverse of the given function.f(x) = - 
A. Domain and range: (-?, 0) ? (0, ?) B. Domain: (-?, 0) ? (0, ?); range: (-?, 0) C. Domain: (0, ?); range: (-?, 0) D. Domain and range: all real numbers
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. Predict the luminosity after 20 hours.
A. y = 107.55 - 41 ln (x), -15.27 B. y = 112.97 - 45.97 ln (x), -24.74 C. y = 100.5 - 32.7 ln (x), 2.54 D. y = 98.75 - 32.66 ln (x), 0.91
Solve the equation.66n2 + 60n = 0
A. - 
B. 0
C. - 
, 0
D. - 
, 60
For problems 13-15:An investor can invest at most $20,000 in a retirement plan. He wants to place at least $5000 in Treasury Notes yielding 5% and more than $14,000 in corporate bonds yielding 8%. He also wants to earn $1420 annually. Let 
the amount invested in Treasury Notes and 
the amount invested in corporate bonds. Estimate the vertices of the feasible region.
A. 
B. 
C. 
D. 
E. none of these