Rewrite the equation in standard form. Find the center and radius of the circle.x2 + y2 + 4x - 12y + 4 = 0
A. (x + 2)2 + (y - 6)2 = 36
center (-2, 6), r = 36
B. (x - 6)2 + (y + 2)2 = 36
center (6, -2), r = 6
C. (x + 2)2 + (y - 6)2 = 36
center (-2, 6), r = 6
D. (x - 2)2 + (y + 6)2 = 36
center (2, -6), r = 6
Answer: C
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Choose the inequality that matches the graph.
A. y > 
x2 + 4x + 6
B. y ? 
x2 + 4x + 6
C. y ? 
x2 + 4x + 6
D. y < 
x2 + 4x + 6
Solve the problem.A salesperson gets a commission of $1600 for the first $10,000 of sales, and then $800 for each additional $10,000 or partial of sales. Let S(x) represent the commission on x dollars of sales. Find the value of 
A. $5200 B. $3600 C. $4400 D. $4800
Write the solution set to the inequality in interval notation.x ? 17
A. (17, ?) B. [17, ?) C. (-?, 17) D. (-?, 17]
Find the area of 
, which has vertices at (0,0), (8,0), and (5,6).
What will be an ideal response?