Decide whether or not the given equation is an identity.2 cos2 
- 1 = cos ?
A. Yes
B. No
Answer: A
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Graph the equation.x - 1 = 0
A. 
B. 
C. 
D. 
Provide an appropriate response.The following contingency table provides a joint frequency distribution for a group of retired people by career and age at retirement. Age at Retirement 
Suppose one of these people is selected at random. Find the probability that the person selected was an attorney. Then find the probability that the person selected was an attorney given that the person retired between 61 and 65. Are the events "attorney" and "retirement between 61 and 65" independent? How can you tell?
What will be an ideal response?
Consider a line with slope m and y-intercept (0,2). Write the distance d between the origin and the line as a function of m. ?
A. 
B. 
C. 
D. 
E. 
Solve the equation by the square root property. If possible, simplify radicals or rationalize denominators. Express imaginary solutions in the form 
3x2 = 39
A. {19.5}
B. {±
}
C. {14}
D. {±13}