Solve the problem.After being struck with a hammer, a gong vibrates 72 vibrations in the first second and in each second thereafter makes 
as many vibrations as in the previous second. Find how many vibrations the gong makes before it stops vibrating.
A. 79 vibrations
B. 504 vibrations
C. 84 vibrations
D. 514 vibrations
Answer: B
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If the equation represents a hyperbola, find the center, foci, and asymptotes. If the equation represents an ellipse, find the center, vertices, and foci. If the equation represents a circle, find the center and radius. If the equation represents a parabola, find the focus and directrix. x2 - 6x + 4y + 25 = 0
A. F: (3, -5); D: y = -3
B. F: (3, -3); D: y = -5
C. F: 
; D: y = - 
D. F: (3, -8); D: y = 0
Write the first n terms of the given arithmetic sequence (the value of n is indicated in the question).The first term is 20, and the common difference is 7; n = 5
A. 20, 27, 34, 41, 48 B. 7, 27, 47, 67, 87 C. 20, 7, 54, 81, 108 D. 20, 7, 34, 41, 48
A function is given. (a) Find all the local maximum and minimum values of the function and the value of x at which each occurs. (b) Find the intervals on which the function is increasing and on which the function is decreasing. State each answer correct to two decimal places.
U(x) = 4(x³ - x)
Shade the solution set in the xy-plane.x2 + y2 ? 9
A. 
B. 
C. 
D. 