Classify the function as a polynomial function, rational function, or root function, and then find the domain. Write the domain in interval notation.f(x) = 
A. rational function; (-?, -8) ? (-8, ?)
B. rational function; (-?, -8) ? (-8, 2) ? (2, ?)
C. rational function; (-?, 2) ? (2, ?)
D. rational function; (-?, ?)
Answer: B
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Solve the problem.A stockbroker bought 30 shares of stock for $42.44 each. What was the total amount of the purchase?
A. $1273.10 B. $1273.30 C. $1273.31 D. $1273.20
Solve the equation by completing the square.x2 + 12x + 61 = 0
A. {-6 - 25i, -6 + 25i} B. {-11, -1} C. {-6 - 5i, -6 + 5i} D. {-6 + 5i}
Find: a. The center and radius of the circle. b. The x- and y-intercepts of the graph of the circle.x2 + y2 - 4y - 21 = 0
A. a. center = (0, -2); radius = 25
b. (
, 0), (0, 7), (0, -3)
B. a. center = (0, 2); radius = 5
b. (
, 0), (-
, 0), (0, 7), (0, -3)
C. a. center = (2, 0); radius = 25
b. (
, 0), (-
, 0), (0, 7), (0, -3)
D. a. center = (0, 2); radius = 5
b. (
, 0), (0, 7)
Decide whether or not the functions are inverses of each other.f(x) = (x - 2)2, x ? 2; g(x) = 
+ 2
A. No B. Yes