Rewrite the equation in standard form. Find the center and radius of the circle.x2 + y2 - 8y - 65 = 0
A. (x - 4)2 + y2 = 81
center (4, 0), r = 9
B. x2 + (y - 4)2 = 81
center (0, 4), r = 9
C. x2 + (y - 4)2 = 81
center (0, -4), r = 9
D. x2 + (y + 4)2 = 81
center (0, -4), r = 9
Answer: B
Mathematics
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Solve the equation graphically. Approximate the solution to the nearest hundredth, if appropriate.
= -2
A. 4
B. 
C. -6
D. -8
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Give the name of the surface.
A. Triangular prism B. Pyramid C. Right circular cone D. Oblique cylinder
Mathematics
Solve the problem.1 + 4 + 42 + 43 + . . . + 4217 =
A. 
B. 
C. 
- 1
D. 4218
E. none of these
Mathematics
Factor completely.x3 - 125
A. (x - 5)(x2 + 25) B. (x - 5)(x2 + 5x + 25) C. (x + 125)(x2 - 1) D. (x + 5)(x2 - 5x + 25)
Mathematics