Solve the problem.An average library contains at least 50 and at most 250 books. How many library owners must be polled to be certain that at least two owners have the same number of books in their libraries?
A. 200 owners
B. 203 owners
C. 201 owners
D. 202 owners
Answer: D
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Solve.A window is in the shape of a square topped by a semicircle. The side of the square is x cm and the window cannot be wider than 160 cm. Find the function for the area of the window and the domain of the function.
A. A = x2 + 
?x2 : 0 < x ? 160
B. A = x2 + 
?
2 : 0 < x ? 1602 + 
?
2
C. A = 4x2 + 
?x2 : 0 < x ? 160
D. A = x2 + 
?
2 : 0 < x ? 160
Solve the equation.x(x2 + 3) = 2 + x3
A. 
B. {3}
C. 
D. {2}
Find the vertices and locate the foci for the hyperbola whose equation is given.y = ± 
A. vertices: (-
, 0), (
, 0)
foci: (-2
, 0), (2
, 0)
B. vertices: (0, -
), (0, 
)
foci: (0, -2
), (0, 2
)
C. vertices: (-6, 0), (6, 0)
foci: (-
, 0), (
, 0)
D. vertices: (-6, 0), (6, 0)
foci: (-2
, 0), (2
, 0)
Evaluate the formula for x = -2, -1, 0, 1, and 2. Plot the resulting ordered pairs.y = 
x2 - 4
A. 
B. 
C. 
D. 