Using Green's Theorem, find the outward flux of F across the closed curve C.F = sin 7yi + cos 5xj ; C is the rectangle with vertices at (0, 0), 
, 
, and 
A. 0
B. - 
?
C. 
?
D. - 
?
Answer: A
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Solve the equation symbolically.
(16x - 20) = 
(15x - 12)
A. 
B. 1
C. -20
D. -1
The population of a country is now 265 million with a 7% per year death rate and a 5% per year birth rate. Each year 100,000 people immigrate to the country. Let yn be the population (in millions) of the country at the end of year n. Find a difference equation satisfied by yn.
A. yn = 1.02yn-1 - 0.1, y0 = 265. B. yn = 1.02yn-1 +0.1, y0 = 265. C. yn = 0.98yn-1 + 0.1, y0 = 265. D. yn = 0.98yn-1 - 0.1, y0 = 265. E. none of these
For problems 4-15, perform the indicated operations and simplify.
A. 
B. 
C. 
D. 
E. none of these
Write an equivalent expression by factoring out the greatest common factor.4y4 - 12y2
A. 4y2(y2 - 3) B. 4y4(y2 - 3) C. 12y2(y2 - 1) D. 4y2(y2 - 12)