Solve the problem.In a study of heat transfer in a grid of wires, the temperature at an exterior node is maintained at a constant value (in °F) as shown in the figure. When the grid is in thermal equilibrium, the temperature at an interior node is the average of the temperatures at the four adjacent nodes. For instance 
Find the temperatures T1, T2, and T3 when the grid is in thermal equilibrium. 
108°180°
A. T1 = 
, T2 = 
, T3 = 
B. T1 = 
, T2 = 
, T3 = 
C. T1 = 
, T2 = 
, T3 = 
D. T1 = 
, T2 = 
, T3 = 105
Answer: C
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Graph the linear inequality.
+ 
? 1
A. 
B. 
C. 
D. 
Find the center and the radius of the circle.x2 + y2 - 4x = -12y - 36
A. (2, -6); r = 3 B. (3, -7); r = 2 C. (2, -6); r = 2 D. (5, -6); r =2
Solve the problem. Use 3.14 as the approximate value of ?. Round to the nearest tenth unless instructed otherwise.The volume of a ball is 85.33? in.3. Find the dimensions of a rectangular box that is just large enough to hold the ball.
A. 4? in. by 4? in. by 4? in. B. 8 in. by 8 in. by 8 in. C. 4 in. by 4 in. by 4 in. D. 8? in. by 8? in. by 8? in.
Find the slope of the tangent line to the graph at the given point.f(x) = 2x2 + x - 3 at (4, 33)
A. 15 B. 17 C. 19 D. 5