Determine the phase shift of the function.y = 
sin (3x + ?)
A. - 
units to the left
B. 
units to the right
C. ? units to the left
D. 
units to the left
Answer: D
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Simplify.
A. 
B. 
C. 
D. 
Use a finite approximation to estimate the area under the graph of the given function on the stated interval as instructed.f(x) = x2 between x = 4 and x = 8 using a left sum with four rectangles of equal width.
A. 174 B. 149 C. 126 D. 165
Write the complex number in rectangular form using exact values if possible. Otherwise, round to one decimal place.5.34(cos 128.6° + i sin 128.6°)
A. -1.4 + 1.8i B. -3.3 + 4.2i C. 1.4 - 1.8i D. 4.2 - 3.3i
Find the standard form of the equation of the ellipse and give the location of its foci.
Center at (-1, 2)
A. 
+ 
= 1
foci at (-1 + 3
, -1) and (-1 - 3
, -1)
B. 
+ 
= 1
foci at (2 + 3
, -1) and (2 - 3
, -1)
C. 
+ 
= 1
foci at (- 3
, 2) and (3
, 2)
D. 
+ 
= 1
foci at (-1 + 3
, 2) and (-1 - 3
, 2)