Solve the problem.Four married couples have reserved eight seats in a row at the theater. If they arrange themselves randomly, what is the probability that all the women will sit in adjacent seats and all the men will sit in adjacent seats?
A. 
B. 
C. 
D. 
Answer: C
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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)]
Tell whether the angle is acute, right, obtuse, straight, or reflex.
A. Reflex B. Right C. Obtuse D. Acute
Solve the equation graphically. Round to the nearest thousandth.log2
= 5 - log3
A. 1.354 B. 1.223 C. 2.296 D. 2.357
The US Postal Service (USPS) will accept only packages with length plus girth no more than 120 inches. (See the figure.)
?
?
What are the dimensions of the largest volume package the USPS will accept?
?
A. 
inches
B. 
inches
C. 
inches
D. 
inches
E. 
inches