At what points is the given function continuous?f(x, y) = 
A. All (x, y) such that x ? y
B. All (x, y) such that x ? - y
C. All (x, y) ? (0, 0)
D. All (x, y)
Answer: B
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Solve the problem.Suppose you would like to cross a 223-foot wide river in a boat. Assume that the boat can travel 31 mph relative to the water and that the current is flowing west at the rate of 6 mph. What bearing should be chosen so that the boat will land at a point exactly across from its starting point? Give your answer to the nearest tenth of a degree.
A. 8.9° B. 78.8° C. 7.4° D. 11.2°
Provide an appropriate response.You win a contest for which the prize is $6,000,000. You are going to receive 20 yearly payments of $300,000. Your friend Karen tells you that it is not costing the contest sponsor $6,000,000 to pay you. What could Karen mean?
What will be an ideal response?
Find the product, if possible. 
A. 
B. 
C. 
D. 
Seven black balls and five white balls are placed in an urn. Two balls are then drawn in succession.
Give your answers in fraction form. What is the probability that the second ball drawn is a white ball if the second ball is drawn without replacing the first? __________ What is the probability that the second ball drawn is a white ball if the first ball is replaced before the second is drawn? __________