Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given.a = 5; r = 2?
A. a5 = 80?4, an = 5 ? 2n-1?n-1
B. a5 = 160?5, an = 5 ? 2n?n
C. a5 = 5 + 8?, an = 5 + 2?(n-1)
D. a5 = 80?, an = 5 ? 2n-1?
Answer: A
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A. - 
B. - 
C. 
D. - sin x
Give a geometric description of the set of points whose coordinates satisfy the given conditions.(x - 1)2 + (y - 6)2 + (z - 6)2 < 16
A. All points outside the lower hemisphere centered at (1, 6, 6) B. All points on the lower hemisphere centered at (1, 6, 6) C. All points within the lower hemisphere centered at (1, 6, 6) D. No set of points satisfy the given relations.
Solve for x. Assume that a and b represent positive real numbers.16x2 = 25a
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For the given quadratic equation, determine whether the parabola opens up or down, find the vertex of the parabola, and find the axis of symmetry.y = x2 - 9x + 6
A. up; 
; x = 
B. up; 
; x = - 
C. up; 
; x = - 
D. up; 
; x = 