Solve the problem.The logistic growth model 
represents the proportion of the total market of a new product as it penetrates the market t years after introduction. When will the product have 65% of the market?
A. 4.33 years
B. 3.09 years
C. 2.09 years
D. 3.33 years
Answer: D
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Calculate the area of the surface S.S is the portion of the paraboloid z = 2x2 + 2y2 that lies between z = 3 and z = 4.
A. 
B. 
C. 
D. 
Solve the equation.y - 4 = -4
A. y = 8 B. y = 0 C. y = -8 D. y = 4
Find the open interval on which the curve given by the vector-valued function 
is smooth.
?
A. 
B. 
C. 
D. 
E. 
Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 
A. Domain: all points in the xy-plane; range: real numbers > 0; level curves: ellipses 
B. Domain: all points in the xy-plane; range: all real numbers; level curves: ellipses 
C. Domain: all points in the xy-plane except (0, 0); range: real numbers > 0; level curves: ellipses 
D. Domain: all points in the xy-plane except (0, 0); range: all real numbers; level curves: ellipses 