Find the indicated intersection or union.Let A = {4, 6, 12, 16} and B = {6, 16, 23, 29}. Write the set A ? B.
A. {6, 16}
B. {6, 16, 23}
C. {4, 6, 12, 16, 23, 29}
D. {4, 6, 16, 23}
Answer: C
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Verify the identity.
- 
= - cos ? cot ?
What will be an ideal response?
Write the best-fit linear model for the data.The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands). Find a linear function that approximates the number of products sold as a function of the cost of advertising. 
A. y = 55.8 - 2.79x B. y = -26.4 - 1.42x C. y = 26.4 + 1.42x D. y = 55.8 + 2.79x
Decide whether the slope is positive, negative, zero, or undefined.
A. Negative B. Undefined C. Zero D. Positive
Write the complete factored form of the polynomial f(x).f(x) = 3x4 + 11x3 - 7x2 - 11x + 4
A. f(x) = 3
(x - 1)(x + 1)(x + 4)
B. f(x) = 3
(x - 1)(x + 1)(x - 4)
C. f(x) = 3
(x - 1)(x + 1)(x + 5)
D. f(x) = 
(x - 1)(x + 1)(x + 4)