Divide.
A. 6.25
B. 5.25
C. 0.19
D. 5
Answer: B
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Find all the second order partial derivatives of the given function.f(x, y) = cos xy2
A. fxx(x, y) = y2 sin xy2; fyy(x, y) = 2[2y2 cos (xy2) - sin (xy2)] ; fyx(x, y) = fxy(x, y) = 2y[y2 cos (xy2) - sin (xy2)]
B. fxx(x, y) = -y4 cos xy2; fyy(x, y) = - 2x[2xy2 cos (xy2) + sin (xy2)]; fyx(x, y) = fxy(x, y) = - 2y[xy2 cos (xy2) + sin (xy2)];
C. fxx(x, y) = - y2 sin xy2; fyy(x, y) = 2[ sin (xy2)- 2y2 cos (xy2)] ; fyx(x, y) = fxy(x, y) = 2y [sin (xy2)-y2 cos (xy2)]
D. fxx(x, y) = - y2 sin xy2; fyy(x, y) = 2y
; fyx(x, y) = fxy(x, y) = 2
Rationalize the denominator. Simplify, if possible.
A. 
B. 
C. 
D. 
Find the specified quartile.The mean annual precipitation (in inches) is given below for 21 different U.S. cities. Find the lower quartile, QL.
A. 14.7 in. B. 15.9 in. C. 15.30 in. D. 16.2 in.
Letting r stand for "The food is good," p stand for "I eat too much," and q stand for "I'll exercise," write the following in symbolic form.If I eat too much, then I'll exercise.
A. q ? p B. r ? p C. p ? q D. p ? q