Use graphical methods to find any turning points of the graph of the function.f(x) = 
A. (14, 4) and (4, 0)
B. (0, 16), (4, 0), and (14, 11.11)
C. No turning points
D. (4, 0) and (6, 4)
Answer: D
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Write a system of two inequalities that describe the constraints in the problem.An office manager needs to buy new filing cabinets. Cabinet A costs $6, takes up 5 square feet of floor space, and holds 7 cubic feet of files. Cabinet B costs $8, takes up 8 square feet, and holds 14 cubic feet. He has only $66 to spend and the office has room for no more than 59 square feet of cabinets. Let x equal the number of cabinet A's bought and y equal the number of cabinet B's bought.
A. 6y + 8x ? 66, 5y + 8x ? 59 B. 7x + 14y ? 59, 59x + 66y ? 8 C. 6x + 8y ? 66, 5x + 8y ? 59 D. 7y + 14x ? 59, 59y + 66x ? 8
Use an equation to solve the problem.At the break-even point for a company, the income is equal to the production cost. For a VCR company, the cost of producing t VCRs is 
The income for selling t VCRs is 46t. How many VCRs must be sold to break even?
A. 800 B. 1600 C. 11.4942529 D. 5
Approximate the value using a calculator. Express answer rounded to three decimal places.44.2
A. 256.000 B. 16.800 C. 337.794 D. 311.170
Find the eccentricity of the ellipse.
?
?
A. Eccentricity: 
B. Eccentricity: 
C. Eccentricity: 
D. Eccentricity: 
E. Eccentricity: 