Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = 
A. ?
B. 0
C. 1
D. No limit
Answer: B
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Translate the problem to a system of equations, then solve using Cramer's Rule.Twice the water flow in the hot-water pipe is the same as three times the flow in the cold-water pipe. The combined flow is 1200 liters per hour. What is the flow in each pipe?
A. 600 liters/hr hot, 400 liters/hr cold B. 400 liters/hr hot, 600 liters/hr cold C. 720 liters/hr hot, 480 liters/hr cold D. 480 liters/hr hot, 720 liters/hr cold
Use the given information to find the exact value of the expression.tan ? = 
, ? lies in quadrant III
Find sin 2?.
A. 
B. - 
C. 
D. - 
Use Bayes' rule to find the indicated probability.The incidence of a certain disease on the island of Tukow is 4%. A new test has been developed to diagnose the disease. Using this test, 91% of those who have the disease test positive while 4% of those who do not have the disease test positive (false positive). If a person tests positive, what is the probability that he or she actually has the disease?
A. 0.438 B. 0.487 C. 0.91 D. 0.856
Find the asymptotes of the hyperbola.y2 - x2 = 4
A. y = 
x and y = - 
x
B. y = 
x and y = - 
x
C. y = x and y = - x
D. y = 2x and y = - 2x