Find the product of the given complex number and its conjugate. Write the answer in the form a + bi.
- 4i
A. 11 + 16i
B. 27
C. 15
D. 11 - 16i
Answer: B
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For the polynomial, list each real zero and its multiplicity. Determine whether the graph crosses or touches the x-axis at each x -intercept.f(x) = 
2(x2 + 6)3
A. - 
, multiplicity 2, touches x-axis; -6, multiplicity 3, crosses x-axis
B. - 
, multiplicity 2, touches x-axis
C. - 
, multiplicity 2, crosses x-axis
D. 
, multiplicity 2, touches x-axis; 6, multiplicity 3, crosses x-axis
Find the domain of the rational function. f(x) = 
A. 
B. 
C. 
D. 
Evaluate the expression for the given value or values.(-6x)2 for x = 4
A. 576 B. -96 C. 96 D. -576
Find the mean and standard deviation of the specified probability density function.f(x) = 5 for [5.2, 5.4]
A. ? = 5.30, ? = 0.058 B. ? = 5.32, ? = 0.058 C. ? = 5.39, ? = 0.056 D. ? = 5.30, ? = 0.056