List the first n terms of the geometric sequence satisfying the given conditions.a2 = 6, a3 = 12, n = 4
A. 6, 12, 24, 48
B. 3, 6, 12, 48
C. 1, 6, 12, 24
D. 3, 6, 12, 24
Answer: D
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Find the volume of the solid generated by revolving the region about the y-axis.The region enclosed by x = 2tan 
, x = 0, y = - 
A. 12? - 3?2
B. 12 - 3?
C. 3? + 3?2
D. 6? - 
?2
Find the standard deviation. Round to one more place than the data.19.6, 12.6, 38.9, 31.8, 22.5, 21.4
A. 4031.6 B. 9.38 C. 35.4 D. 3591.7
Find the point-slope equation for the line with the given properties.Slope = - 
; line passes through the point (4, 5)
A. y + 5 = - 
(x + 4)
B. y - 5 = - 
(x - 4)
C. y - 5 = 
(x - 4)
D. y - 5 = - 
(x + 4)
Solve.If an earthquake measured 8.3 on the Richter scale, what was the intensity of the earthquake in terms of I0? The magnitude on the Richter scale of an earthquake of intensity I is 
A. 4020? I0 B. 199,526,231 ? I0 C. 19,952,623? I0 D. 158,489,319? I0