Find the sum or difference.
+ 
A. 
B. 
C. 
D. 
Answer: A
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Solve the problem.Find the volume generated by revolving about the x-axis the region bounded by the following graph:
A. 10?
B. 
?
C. 
?
D. 100?
Solve the equation.|x| = 5
A. {-5, 5} B. {-5} C. {5} D. {25}
Identify the equation without applying a rotation of axes.4x2 - 2xy + 4y2 - 4x - 4y - 5 = 0
A. circle B. hyperbola C. ellipse D. parabola
The cost of controlling emissions at a firm goes up rapidly as the amount of emissions reduced goes up. Here is a possible model:
?
?
where q is the reduction in emissions (in pounds of pollutant per day) and C is the daily cost (in dollars) of this reduction. Government clean-air subsidies to the firm are based on the formula
?
?
where q is again the reduction in emissions (in pounds per day) and S is the subsidy (in dollars). Calculate the net cost function
?
??
given the cost and subsidy above, and find the value of q that gives the lowest net cost. What is this lowest net cost?
?
A. 
B. 
C. 
D. 
E. 