A rectangular garden of area 50 square feet is to be surrounded on three sides by a fence costing $2 per running foot and on one side by a brick wall costing $6 per running foot. Let x be the length of the brick wall side. Which of the following represents the total cost of the material?
A. 
+ 
B. 6x + 
C. 3x + (50 - x)
D. 6x + 
E. none of these
Answer: E
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Match the inequality with its correct representation.
A. x ? -2 B. x > -2 C. x ? -2 D. x < -2
Find y '.y = 
A. 
+ 4x
B. 
+ 4x
C. - 
+ 4x
D. - 
- 4x
Evaluate the surface integral of the function G over the surface S.G(x, y, z) = x2y2z2; S is the surface of the rectangular prism formed from the planes x = ±3, y = ±1, and 
A. 135 B. 405 C. 270 D. 9
Solve the problem.Janet is training for a triathlon. Yesterday she jogged for 12 miles and then cycled another 31.5 miles. Her speed while cycling was 6 miles per hour faster than while jogging. If the total time for jogging and cycling was 3.75 hours, at what rate did she cycle?
A. 14 miles per hour B. 13 miles per hour C. 12 miles per hour D. 16 miles per hour