Choose the expression or equation that is equivalent to the one given.log9 1
A. 9
B. 1
C. x9
D. 0
Answer: D
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Compute r''(t).r(t) = (2 cos t)i + (6 sin t)j
A. r''(t) = (-2 cos t)i + (-6 sin t)j B. r''(t) = (-2 sin t)i + (-6 cos t)j C. r''(t) = (2 sin t)i + (6 cos t)j D. r''(t) = (2 cos t)i + (6 sin t)j
Use the table to find the indicated limit.If f(x) = x2 + 8x - 2, find 
f(x). 
A. 
; limit = ?
B. 
; limit = 18.0
C. 
; limit = 17.70
D. 
; limit = 5.40
Evaluate.(-4)4
A. 256 B. 64 C. -256 D. -1024
Find the center, foci, and vertices of the ellipse.3x2 + 4y2 - 42x + 56y + 331 = 0
A. 
+ 
= 1
center: (7, -7); foci: (8, -7), (6, -7); vertices: (9, -7), (5, -7)
B. 
+ 
= 1
center: (-7, 7); foci: (-6, 7), (-8, 7); vertices: (-9, 7), (-5, 7)
C. 
+ 
= 1
center: (7, -7); foci: (8, -7), (6, -7); vertices: (9, -7), (5, -7)
D. 
+ 
= 1
center: (-7, 7); foci: (-6, 7), (-8, 7); vertices: (-9, 7), (-5, 7)