Find the polar equation of the conic with focus at the pole, having the given properties. Identify the conic.Directrix y= -6, eccentricity 5
A. r = 
, hyperbola
B. r = 
, hyperbola
C. r = 
, hyperbola
D. r = 
, ellipse
Answer: C
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Solve the problem.A company knows that the unit cost C and the unit revenue R from the production and sale of x units are related by 
Find the rate of change of unit revenue when the unit cost is changing by 
and the unit revenue is $2,000.
A. $729.75/unit B. $150.00/unit C. $660.00/unit D. $799.50/unit
Simplify the rational expressions.
A. 
B. 
C. 
D. 
Use the product-to-sum identities to rewrite the expression as the sum or difference of two functions.sin 
? sin 
?
A. 
B. 
C. 
D. 
Find the perimeter of the figure.The local park district acquired lands to be used for a new dog park. How many miles of fencing are needed to enclose the dog park?
A. 400 mi B. 380 mi C. 310 mi D. 456 mi