Solve the problem.A company determines that its marginal profit, in dollars, from producing x units is given by 
where x ? 1. Suppose that it would be possible for the company to make infinitely many units of this item. Find the total profit. Round to the nearest dollar.
A. $6090
B. $6100
C. $6070
D. $6080
Answer: D
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Find the largest open interval where the function is changing as requested.Increasing y = 7x - 5
A. (-5, 7) B. (-?, 7) C. (-5, ?) D. (-?, ?)
Add and write the result in lowest terms.
+ 
A. 
B. 
C. 
D. 5
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 (-0.57, -6.12) local maximum at (1.32, 5.64) local minimum at (3, -3) C. local minimum at (-1, -6) local maximum at (1, 6) local minimum at (3, -3) D. local minimum at (-3, -3) local maximum at (-1.32, 5.64) local minimum at (0.57, -6.12)
Find the vertex of the parabola and graph it.
A. 
B. 
C. 
D. 
E. 