Find the center (h, k) and radius r of the circle. Graph the circle.2x2 + 2y2 - 8x + 16y + 22 = 0
A. (h, k) = (2, -4); r = 9
B. (h, k) = (-2, 4); r = 3
C. (h, k) = (2, -4); r = 3
D. (h, k) = (-2, 4); r = 9
Answer: C
Mathematics
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A. x3 + 9x - 1 B. 3x3 C. x3 - 1 D. x3
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Solve the differential equation.
= 6x
A. y = 3 sin-1 (3x2 + C) B. y = sin (3x2 + C) C. y = 3 sin (3x2 + C) D. y = sin-1 (3x2 + C)
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Solve the problem.A nuclear cooling tower cross section is a hyperbola having a diameter of 52 ft at the center. The distance between the two foci is 96 ft. What is the equation for the hyperbola?
A. 
- 
= 1
B. 
- 
= 5
C. 
- 
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Mathematics