Graph the circle. Identify the center.(x - 2)2 + (y + 1)2 = 16
A. center: (2, -1)
B. center: (- 2, 1)
C. center: (- 2, 1)
D. center: (2, -1)
Answer: A
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Solve the problem.Using a phone card to make a long distance call costs a flat fee of $0.25 plus $0.12 per minute starting with the first minute. What is an equation of the form 
for this situation?
A. y = 0.25x B. y = 0.25x + 0.12 C. y = 0.12x + 0.25 D. y = 0.12x
Determine the quotient.
A. 0 B. 21 C. Undefined D. 1
Solve the problem.A rectangular box with volume 345 cubic feet is built with a square base and top. The cost is $1.50 per square foot for the top and the bottom and $2.00 per square foot for the sides. Let x represent the length of a side of the base. Express the cost of the box as a function of x. Give the function and state its domain.
A. C(x) = 3x2 + 
Domain: {x| x > 0}
B. C(x) = 4x + 
Domain: {x| x > 0}
C. C(x) = 3x2 + 
Domain: {x| x > 4}
D. C(x) = 2x2 + 
Domain: {x| x < 10}
Write the conjugate 
of the complex number z. Then find z
.z = 
+ 7i
A. 
= 
- 7i, z
= 56
B. 
= 
- 7i, z
= 63
C. 
= 
- 7i, z
= -42
D. 
= 
- 7i, z
= 42