Completely factor the polynomial or state that the polynomial is prime.x2 + 4
A. prime
B. (x - 2)2
C. (x + 2)2
D. (x + 2)(x - 2)
Answer: A
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Solve the problem.An exterminator activates an aerosol "fogger" in a large auditorium. The concentration of insecticide immediately afterwards can be modeled by the function C(x, y, z) = -0.0001 ln
,where x, y, and z are measured in feet from a particular floor-level corner of the room. To escape the insecticide, a flying insect located at 
needs to fly immediately in the direction of greatest decrease in concentration. Find the unit vector indicating the direction the insect should fly.
A. u = 
B. u = 
C. u = 
D. u = 
Graph the function.y = 
sec x
A. 
B. 
C. 
D. 
The nth term of a sequence is given. Find the first 4 terms.an = 8n - 4
A. 12, 12, 20, 28 B. 8, 12, 20, 28 C. 4, 20, 20, 36 D. 4, 12, 20, 28
Factor completely.x2 + 2xy - 24y2
A. (x - 6y)(x + y) B. (x + 6y)(x - 4y) C. (x - 6y)(x + 4y) D. (x - y)(x + 4y)