Find the polar equation of the given rectangular equation.xy = 1
A. r2 = 2 csc 2?
B. r2 = 2 sec 2?
C. r2 = sec 2?
D. r2 = csc 2?
Answer: A
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Given matrix A, find the indicated cofactor.Find A34.A = 
A. -16 B. 32 C. 16 D. 0
Find the surface area of the circular solid. Unless otherwise specified, use 3.14 for ? and round your answer to the nearest tenth.A sphere with r = 3 cm
A. 28.3 cm2 B. 37.7 cm2 C. 113.2 cm2 D. 113.0 cm2
Solve the equation.6x - 4 + 7(x + 1) = -5x - 7
A. {-5}
B. 
C. 
D. 
Solve the problem.Suppose that demographic studies show that each year about 8% of a city's population moves to the suburbs (and 92% stays in the city), while 4% of the suburban population moves to the city (and 96% remains in the suburbs). In the year 2000, 64.1% of the population of the region lived in the city and 35.9% lived in the suburbs. What percentage of the population of the region would eventually live in the city if the migration probabilities were to remain constant over many years? For simplicity, ignore other influences on the population such as births, deaths, and migration into and out of the region.
A. 33.3% B. 66.7% C. 41.7% D. 50%