Find the flux of the curl of field F through the shell S.F = (9 - y)i + (7 + x)j + z5k; S is the upper hemisphere of x2 + y2 + z2 = 25
A. 50?
B. -4?
C. 2?
D. 100?
Answer: A
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Solve the differential equation.3x2y' - 2xy = y-3
A. y2 = 
+ Cx8/3
B. y2 = 
+ Cx11/3
C. y4 = 
+ Cx8/3
D. y4 = 
+ Cx11/3
Solve the problem.An endangered species of fish has a population that is decreasing exponentially
The population 6 years ago was 1900. Today, only 900 of the fish are alive. Once the population drops below 100, the situation will be irreversible. When will this happen, according to the model? Round to the nearest whole year.
A. 17 years from today B. 20 years from today C. 18 years from today D. 19 years from today
Solve the equation.
= 
A. {4}
B. 
C. ?
D. 
Find an equation of a parabola that satisfies the given conditions.Focus (4, 7), directrix y = 5
A. (x - 7)2 = 4(y - 6) B. (x - 4)2 = 4(y - 6) C. (x - 4)2 = 4(y - 7) D. (y - 7)2 = 4(x - 4)