A geometric sequence is given. Find the common ratio and write out the first four terms.{sn} = 
A. an = 6 
n-1
r = 
; s1 = 6, s2 = 
, s3 = 
, s4 = 
B. an = 
(6)n-1
r = 
; s1 = 6, s2 = 12, s3 = 24, s4 = 48
C. an = 6 
n-1
r = 
; s1 = 6, s2 = 3, s3 = 
, s4 = 
D. an = 6 ? (2)n-1
r = 2; s1 = 6, s2 = 12, s3 = 24, s4 = 48
Answer: C
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Find the x-intercepts for the parabola whose equation is given. If the x-intercepts are irrational, round your answers to the nearest tenth.y = x2 + 4x - 7
A. x-intercepts: none B. x-intercept: (4, 0) C. x-intercepts: (-2 ± 3.3, 0) D. x-intercepts: (-4, 0) and (3, 0)
Perform the indicated operations and simplify the result. Leave the answer in factored form.
÷ 
A. 
B. 
C. 
D. 27
Write the conjugate 
of the complex number z. Then find z
.z = 1 + 7i
A. 
= 1 - 7i, z
= -48
B. 
= 1 - 7i, z
= 1 - 49i2
C. 
= 1 - 7i, z
= 50
D. 
= 1 - 7i, z
= 1 - 49i
?The revenue R for a company selling x units is 
. Use differentials to approximate the change in revenue if sales increase from 
to 
style="vertical-align: middle;" data-wiris-created="true" /> units. ? A. ?48,000 dollars B. ?50,000 dollars C. ?45,000 dollars D. ?53,000 dollars E. ?60000 dollars