Solve the problem.The profit that a vendor makes per day by selling x pretzels is given by the function 
Find the number of pretzels that must be sold to maximize profit.
A. 260 pretzels
B. 1.2 pretzels
C. 300 pretzels
D. 600 pretzels
Answer: C
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Describe the given set of points with a single equation or with a pair of equations.The circle in which the plane through the point (10, -9, -9) perpendicular to the x-axis meets the sphere of radius 26 centered at the origin.
A. x2 + y2 + z2 = 576 and y = 10 B. x2 + y 2 + z2 = 476 and y = 10 C. x2 + y2 + z2 = 676 and x = 10 D. x2 + y2 + z2 = 676 and z = 10
Use the Root Test to determine if the series converges or diverges.
A. Diverges B. Converges
Perform the indicated operations graphically.(-4 + 4j ) + ( 2 + 4j )
A. 
a = -4 + 4j
b = 2 + 4j
c = (-4 + 4j ) + ( 2 + 4j )
B. 
a = -4 - 4j
b = 2 + 4j
c = (-4 + 4j ) + ( 2 + 4j )
C. 
a = -4 + 4j
b = 2 + 4j
c = (-4 + 4j ) + ( 2 + 4j )
D. 
a = -4 + 4j
b = 2 + 4j
c = (-4 + 4j ) + ( 2 + 4j )
Simplify the expression.sin 8x cos 4x + cos 8x sin 4x
A. sin 4x B. sin 12x C. cos 12x D. cos 4x