Factor as completely as possible. If unfactorable, indicate that the polynomial is prime.x3 + 4x2 - 4x - 16
A. (x - 2)2(x + 4)
B. (x2 - 4)(x + 4)
C. (x + 2)(x - 2)(x + 4)
D. Prime
Answer: C
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Approximate the logarithm to four decimal places using the change of base formula.log1/25
A. -2.3219 B. 0.3979 C. -0.4307 D. 1.0000
Provide an appropriate response.If 
, then
A. x1 = -1 + x3 - x4, x2 = 4 + 2x3 + x4, x3 = x3, x4 = x4 B. x1 = 2 + x3, x2 = -1 - 2x3 - 4x4, x3 = x3, x4 = x4 C. x1 = 3 - 6x4, x2 = 4 + x4, x3 = -2 + 3x4, x4 = x4 D. x1 = 3 - 6x4, x2 = 4 - x4, x3 = -2 + 3x4, x4 = x4 E. x1 = -1 + x4, x2 = 3x4, x3 = 6 + 2x4, x4 = x4
Graph.y2 - x2 - 8y + 6x - 42 = 0 
A. 
B. 
C. 
D. 
Assume that 80% of all children who are exposed to chicken pox contract the disease. If 1225 children are exposed to chicken pox, the probability that more than 945 of them will contract the disease is approximately the area under the standard normal curve
A. to the right -2.46. B. to the right of -2.50. C. to the right -0.18. D. to the left 2.46. E. none of these