Solve the problem.The cost of tiling the floor in a rectangular room varies jointly as the width and length of the room. If a room with width 9 feet and length 12 feet costs $160.92 to tile, find the cost to tile the floor of a room with width 14 feet and length 23 feet.
A. $479.78
B. $485.04
C. $469.96
D. $480.85
Answer: A
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Evaluate the indicated function with the given information.Find the value of cos 
if sin ? = 
(90° < ? < 180°).
A. 
B. 
C. 
D. 
Solve the problem.The graphs below show the first and second derivatives of a function 
. Select a possible graph f that passes through the point P.f'?f"
?
A. 
[NOTE: Graph vertical scales may vary from graph to graph.]
B. 
[NOTE: Graph vertical scales may vary from graph to graph.]
C. 
[NOTE: Graph vertical scales may vary from graph to graph.]
D. 
[NOTE: Graph vertical scales may vary from graph to graph.]
Solve the formula for the specified variable.I = 
for n
A. n = 
B. n = 
C. n = IR(Ir - E)
D. n = 
The primal problem and the final tableau in the solution of the primal problem are given. Use the final tableau to solve the dual problem.Primal problem :Maximize7x1?+ 8x2subject tox1?+ 2x2? 105x1+ 4x2? 30and x1 ? 0, x2 ? 0Final tableau in solution to primal problem: x1x2?x3?x4?M 
A. Minimum = 50 when y1 = 2 and y2 = 1
B. Maximum = 50 when y1 = 2 and y2 = 1
C. Minimum = 50 when y1 = 
and y2 = 
D. Minimum = 0 when y1 = 0 and y2 = 0