Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given.a3 = 
; a6 = 
A. an = 
n-1
B. an = 
+ 
(n - 1)
C. an = 
n-1
D. an = 
(-3)n-1
Answer: C
Mathematics
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The water level in a tank rises 8 inches every minute. Write an equation of change that describes the height H, in inches, of the water at time t minutes. ?
A. 
B. 
C. 
D. 
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Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.r = 
A. 
B. 
C. 
D. 
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Use the graph to find a ? > 0 such that for all x, 0 < 
< ? ? 
< ?.
A. 0.04 B. 0.02 C. -0.4 D. 0.3
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Show that the equation is not an identity by finding a value of x for which both sides are defined but not equal.cos (x - ?) = cos x
A. 
B. 
C. - 
D. 0
Mathematics