Determine the direction in which the parabola opens, and the vertex.x = -(y + 3)2 - 8
A. Opens to left; (-8, 3)
B. Opens to left; (-3, -8)
C. Opens to left; (-8, -3)
D. Opens to right; (-3, -8)
Answer: C
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Find the distance d(P1, P2) between the points P1 and P2.
A. 84
B. 14
C. 84
D. 2
Solve the problem.Suppose a cost-benefit model is given by 
where C is the cost in thousands of dollars for removing p percent of a given pollutant. Find C(90) to the nearest dollar and interpret it.
A. $52,200; It will cost $52,200 to remove 90% of the pollutant. B. $5800; It will cost $5800 to remove 0.90% of the pollutant. C. $5220; It will cost $5220 to remove 0.90% of the pollutant. D. $9000; It will cost $9000 to remove 90% of the pollutant.
Solve the equation by factoring.15x3 + 90x2 + 120x = 0
A. -4, -2
B. - 
, -2
C. 0, 4, 2
D. 0, -4, -2
Solve the equation.
= 
A. 
B. 
C. 
D. 