Solve the equation.x(x - 1) = 20
A. {-4, -5}
B. {-4, 5}
C. {4, -5}
D. {4, 5}
Answer: B
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Use the FOIL method to find the product. Express the product in descending powers of the variable.(x - 2)(x2 + 6)
A. x3 + 6x2 - 2x - 12 B. x2 + 4x - 12 C. -2x2 + x - 12 D. x3 - 2x2 + 6x - 12
Evaluate the derivative of the given function at the given point.x2 + y2 = 25; (-4, 3)
A. - 
B. 
C. 
D. - 
Find the flux of the vector field F across the surface S in the indicated direction.F = 5xi + 5yj + z3k; S is portion of the cylinder x2 + y2 = 16 between z = 0 and z = 3; direction is outward
A. 480? B. -480? C. 240 D. 480
Solve the problem.Behemoth Back Packs, Inc. finds that the cost to make x back packs is 
while the revenue produced from them is 
(C and R are in dollars). What is the smallest whole number of back packs, x, that must be sold for the company to show a profit?
A. 87 back packs B. 2,509,018 back packs C. 34 back packs D. 970,642 back packs