Determine all critical points for the function.f(x) = 80x3 - 3x5
A. x = 4
B. x = 0, x = -4, and x = 4
C. x = -4 and x = 4
D. x = -4
Answer: B
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Solve.The total revenues (in dollars) for a hot dog vendor selling x hot dogs is given by the polynomial 
. Find the total revenue in selling 50 hot dogs.
A. $8.75 B. $437.50 C. $87.50 D. $875.00
Find the foci of the hyperbola.5x2 - y2 = 40
A. (0, 4
) and (0, -4
)
B. (4
, 0) and (-4
, 0)
C. (
, 0) and (-
, 0)
D. (0, 4
) and (0, -4
)
Solve the problem.A bicycle wheel makes 4 revolutions. Determine how far the bicycle travels in inches if the diameter of the wheel is 23 in. 
Round to the nearest tenth.
A. 288.9 in. B. 577.8 in. C. 92 in. D. 72.2 in.
Find the center, foci, and vertices of the ellipse.16(x + 2)2 + 9(y - 1)2 = 144
A. center at (1, -2)
foci at (1, -2 - 
), (1, -2 + 
)
vertices at (1, 5), (1, -3)
B. center at (-1, 1)
foci at (-1, 1 - 
), (-1, 1 + 
)
vertices at (-1, 5), (-1, -3)
C. center at (2, 1)
foci at (2, 1 - 
), (2, 1 + 
)
vertices at (2, 5), (2, -3)
D. center at (-2, 1)
foci at (-2, 1 - 
), (-2, 1 + 
)
vertices at (-2, 5), (-2, -3)