Multiply and simplify. Assume that all variables represent positive real numbers.(11
)2
A. 121
B. 11y2
C. 121y2
D. 121y
Answer: D
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Give an appropriate answer.A bee was flying downward along the curve that is the intersection of 
with the plane y = 1. At the point 
the bee went off on the tangent line. Where did the bee hit the yz-plane?
A. (1, 0, -19) B. (0, 1, 25) C. (0, 1, -8) D. (0, 1, -19)
Solve by the substitution method.y = 4x + 32x + y = 21
A. {(15, 3)} B. {(2, 11)} C. {(3, 15)} D. {(15, -9)}
Find the volume under the surface z = f(x,y) and above the rectangle with the given boundaries.z = x2 + y2; R = {(x, y): 0 ? x ? 1, 0 ? y ? 1}
A. 
B. 
C. 
D. 
Solve the problem.The logistic growth model 
represents the population of a species introduced into a new territory after t years. What will the population be in 20 years?
A. 240 B. 146 C. 91 D. 101