Find the domain of x in the expression.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: C
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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 = 
Use the rules for exponents to rewrite the expression and then evaluate the new expression. 
A. 0 B. -12 C. 1 D. -4
Solve the equation.
= -4
A. 6 B. 8 C. -6 D. -8
Use the discriminant to determine whether the quadratic equation has two unequal real solutions, a repeated real solution, or no real solution without solving the equation.x2 - 4x + 4 = 0
A. repeated real solution B. two unequal real solutions C. no real solution