Solve the problem.Express 75° as ? - ?, where sin ? and sin ? are known exactly.
A. 105°- 30°
B. 145°- 70°
C. 90°- 15°
D. 120° - 45°
Answer: D
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Calculate the double integral.
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Use the preference table to answer the question.The preference table shows the results of an election among three candidates, A, B, and C. 
(a) Using the plurality method, who is the winner?(b) The voters in the two columns on the right move their last-place candidates from last place to first place. Construct a new preference table for the election. Using the table and the plurality method, who is the winner?(c) Suppose that candidate A drops out of the new table, but the winner is still chosen by the plurality method. Is the independence-of-irrelevant-alternatives criterion satisfied?
A. C; A; yes B. A; C; yes C. C; C; yes D. A; A; yes
Find a quadratic function that best fits the data. Give answers to the nearest hundredth.
A. y = 0.83x2 + 1.68x + 12 B. y = -0.83x2 + 1.68x + 12 C. y = 0.29 - 6.14x + 12 D. y = -x2 + 12
Multiply.(-7x2)(-8x6)(-2x4)
A. 112x12 B. -112x48 C. 112x48 D. -112x12