Write the standard form of the equation of the circle with radius r and center (h, k).r = 7; (h, k) = (0, 4)
A. x2 + (y + 4)2 = 7
B. x2 + (y - 4)2 = 49
C. (x - 4)2 + y2 = 49
D. (x + 4)2 + y2 = 49
Answer: B
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Find the integral.
A. 55.2 B. 40.2 C. 6.70 D. 9.48
Find two paths of approach from which one can conclude that the function has no limit as (x, y) approaches (0, 0).f(x, y) = 
What will be an ideal response?
Sketch the graph of the quadratic function. Identify the vertex and axis of symmetry.f(x) = (x - 11)2
A. vertex: (11, 0)
axis of symmetry: x = 11
B. vertex: (0, 0)
axis of symmetry: x = 0
C. vertex: (0, -11)
axis of symmetry: x = 0
D. vertex: (-11, 0)
axis of symmetry: x = -11
Solve the problem.Hi-Tech UnWater begins a cable TV advertising campaign in Miami to market a new water. The percentage of the target market that buys water is estimated by the function 
t represents the number of days of the campaign. After how long will 90% of the target market have bought the water?
A. 120 days B. 90 days C. 115 days D. 3 days