Find the square root.
A. 8
B. -8
C. -32
D. not a real number
Answer: D
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Find all the second order partial derivatives of the given function.f(x, y) = cos (xy2)
A. 
= - y2 sin xy2; 
= 2y
; 
= 
= 2
B. 
= - y2 sin xy2; 
= 2[ sin (xy2)- 2y2 cos (xy2)] ; 
= 
= 2y [sin (xy2)-y2 cos (xy2)]
C. 
= -y4 cos xy2; 
= - 2x[2xy2 cos (xy2) + sin(xy2)]; 
= 
=
- 2y[xy2 cos (xy2) + sin(xy2)];
D. 
= y2 sin xy2; 
= 2[2y2 cos (xy2) - sin (xy2)] ; 
= 
= 2y[y2 cos (xy2) - sin (xy2)]
Translate the phrase to an algebraic expression. Use x to represent "a number."The sum of -4 and a number
A. -4 + x B. -4x C. -4 - x D. 4 + x
Provide an appropriate response.A markup rate of 35% based on sales price converts to a 45% markup rate based on cost.
A. True B. False
Evaluate the expression without the use of a calculator, and then verify your answer using a calculator.eln 8
A. ln 8 B. 7 C. e8 D. 8