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 = 98.75 - 32.66 ln (x), 0.91
B. y = 107.55 - 41 ln (x), -15.27
C. y = 100.5 - 32.7 ln (x), 2.54
D. y = 112.97 - 45.97 ln (x), -24.74
Answer: A
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Find the slope of the line containing the two given points.
and 
A. 
B. 
C. 
D. 
Solve the problem.A construction crane lifts a 100-lb bucket originally containing 140 lb of sand at a constant rate. The sand leaks out at a constant rate so that there is only 70 lb of sand left when the crane reaches a height of 90 feet. How much work is done by the crane?
A. 3375 ft ? lb B. 18,450 ft ? lb C. 21,600 ft ? lb D. 9450 ft ? lb
Provide an appropriate response. e2 =
A. 100 B. 0.001 C. 7.38 D. 0.135
Provide an appropriate response.Fill in the blanks to complete the statement. The graph of P(x) = -0.4(x - 7)2 is a parabola with 
x-intercept(s). Its vertex is the 
point of the graph and has coordinates 
.
A. two; maximum (or highest); (7, 0) B. one; maximum (or highest); (7, 0) C. one; minimum (or lowest); (7, 0) D. no; maximum (or highest); (-0.4, 7)