Simplify the expression. Assume that all variables are positive when they appear.4
+ 
A. 16
B. 5
C. 8
D. 4
+ 
Answer: C
Mathematics
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Set up the iterated integral for evaluating 
over the given region D. DD is the right circular cylinder whose base is the circle 
in the xy-plane and whose top lies in the plane 
.
A. 
B. 
C. 
D. 
Mathematics
Find the area of the specified region.Inside the circle r = 2 cos ? + 7 sin ?
A. 7?
B. 
C. 
+ 7
D. 
Mathematics
Multiply.(x - 9)2
A. x + 81 B. x2 + 81 C. x2 - 18x + 81 D. 81x2 - 18x + 81
Mathematics
Solve the problem.A salesman packed 3 shirts and 6 ties. With one shirt, he could wear all 6 ties. With another shirt, he could wear 5 ties. With the third shirt, he could wear only 3 ties. How many different combinations did he have?
A. 14 B. 13 C. 90 D. 33
Mathematics