Using the exponential key of a calculator to find an approximation to the nearest thousandth.0.74.544
A. 40,000.761
B. 0.198
C. 3.181
D. 4.9
Answer: B
Mathematics
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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)]
Mathematics
Solve.A number less 7 is -19. Find the number.
A. 12 B. 26 C. -12 D. -26
Mathematics
Multiply.
2
A. 49x2 - 2x + 
B. 49x2 - 2x
C. 49x2 - 
D. 49x2 - 
x - 
Mathematics
Find the sum of the first n terms of the following arithmetic sequence.91, 174, 257, . . .; n = 10
A. -2825 B. 4645 C. 4190 D. -4190
Mathematics