Solve the formula for the indicated letter. Assume that all variables represent nonnegative numbers.
= kn, for n
A. n = 
B. n = ±
C. n = 
D. n = 
Answer: A
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Solve the problem.Find the volume of the solid generated by revolving the region in the first quadrant bounded by the coordinate axes, the curve y = e-2x, and the line x = 3 about the y-axis.
A. 
?(1 - 6 e-6)
B. 
?(1 - 5 e-6)
C. 
?(1 - 7 e-6)
D. - 
?(1 + 7 e-6)
Determine whether the Law of Sines or the Law of Cosines should be used to begin to solve the given triangle. Do not solve the triangle. 
A. Law of Cosines B. Law of Sines
If possible, solve each system by an algebraic method (substitution or addition method). Otherwise, state that the problem has no solution or an infinite number of solutions.
x + 
y = 4 x - y = -4
A. (3, 9) B. (4, 8) C. (-4, 9) D. (8, 4)
Solve the problem.Monday's closing value of your company's stock was up 
. Tuesday's was up 
, Wednesday's was down 
, but Thursday's closing was up again by 
. Finally, the stock closed the week down 
. What was the net change for the week?
A. 
B. - 
C. 
D. - 