Solve the problem.Below is a floor plan of a suite of offices. Place a door in one of the rooms so that a security guard can enter by the door marked "enter", pass through each door and lock it behind him, and then exit by the door you have placed in the plan. 
A. Place door in room E.
B. Place door in room D.
C. Place door in room A.
D. Place door in room B.
Answer: D
Mathematics
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Solve the problem.A sequence is defined by f(n) = floor(
) ? ceiling(
). By looking at several examples on your calculator determine 
A. n2 - n B. n2 + n C. (n - 1)2 D. (n + 1)2
Mathematics
Determine if the given function y = f(x) is a solution of the accompanying differential equation.Differential equation: 2xy' + 2y = cos xInitial condition: y(?) = 0Solution candidate: y = 
A. Yes B. No
Mathematics
Add or subtract as indicated. Simplify, if necessary.- 
+ 
A. 0
B. 1
C. -1
D. 
Mathematics
Provide an appropriate response.If the seller is to pay the shipping costs, the bill of lading will be marked "freight collect."
A. True B. False
Mathematics