Pivot once about the circled element in the simplex tableau, and read the solution from the result. 
A. x1 = 3, s1 = -15, z = -7; x2, x3, s1 = 0
B. x1 = 9, x2 = -15, z = -7; x2, x3, s2 = 0
C. x1 = 3, x2 = -15, z = 11; x3, s1, s2 = 0
D. x1 = 3, x2 = 21, z = -7; x3, s1, s2 = 0
Answer: A
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Use the graph to find a ? > 0 such that for all x, 0 < 
< ? ? 
< ?.
A. 0.1 B. 9 C. -0.1 D. 0.2
Solve the problem.What is the range of the cosine function?
A. all real numbers greater than or equal to 0 B. all real numbers C. all real numbers greater than or equal to 1 or less than or equal to -1 D. all real numbers from -1 to 1, inclusive
Convert. Round to the nearest hundredth, when necessary.193 grams to ounces
A. 5471.55 ounces B. 424.6 ounces C. 6.76 ounces D. 86.85 ounces
Find the center and radius of the circle whose graph is shown. Write the standard form of the equation of the circle.
A. r = 4; (h, k) = (2, 4); (x + 2)2 + (y + 4)2 = 16 B. r = 4; (h, k) = (2, 4); (x - 2)2 + (y - 4)2 = 16 C. r = 2; (h, k) = (2, 4); (x - 2)2 + (y - 4)2 = 4 D. r = 2; (h, k) = (2, 4); (x + 2)2 + (y + 4)2 = 4