Solve the problem.Evaluate 
at t = 9 for the function w(x, y, z) = exyz2; x = t, y = t, z = 
.
A. 
B. 
e
C. 0
D. - 
e
Answer: C
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Give all solutions of the nonlinear system of equations, including those with nonreal complex components.x2 + 3xy + y2 = 4 x2 - 3xy - y2 = 4
A. {(2, -6), (-2, 6)} B. {(2, 0), (-2, 0)} C. {(2, 0), (-2, 0), (2, -6), (-2, 6)} D. {(0, 2), (0, -2), (2, -6), (-2, 6)}
Find the sum of the terms in the geometric sequence.-15, -3, - 
, - 
, . . .
A. -15
B. - 
C. - 
D. 
The concentration y of a certain drug in the bloodstream t hours after an oral dosage (with 
) is given by the equation 
. What is the concentration after 6 hours? Round your answer to one decimal place.
?
A. 106.3 B. ?1,499.1 C. 222.0 D. 40,242.9 E. 93.7
Solve.The weight of a liquid varies directly as its volume V. If the weight of the liquid in a cubical container 4 cm on a side is 192 g, find the weight of the liquid in a cubical container 5 cm on a side.
A. 15 g B. 375 g C. 105 g D. 125 g