Solve the problem.If the average cost per unit C(x) to produce x units of plywood is given by 
what is the unit cost for 20 units?
A. $5.00
B. $1.50
C. $10.00
D. $15.00
Answer: C
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Solve for x using an equivalent exponential expression.log3 x = 2
A. 6 B. 8 C. 5 D. 9
Solve the equation.2x + 3 = 0
A. - 
B. 
C. 
D. - 
Use the graph to answer the question. 
Which month in 2006 had the lowest sales?
A. Month 8 B. Month 3 C. Month 2 D. Month 6
Use a graphing utility to graph the function over the indicated interval and approximate any local maxima and local minima. If necessary, round answers to two decimal places.f(x) = x4 - 5x3 + 3x2 + 9x - 3; (-5, 5)
A. local minimum at (-0.61, -5.64) local maximum at (1.41, 6.12) local minimum at (3, -3) B. local minimum at (-3, -3) local maximum at (-1.32, 5.64) local minimum at (0.57, -6.12) C. local minimum at (-0.57, -6.12) local maximum at (1.32, 5.64) local minimum at (3, -3) D. local minimum at (-1, -6) local maximum at (1, 6) local minimum at (3, -3)