Find all cube roots of the complex number. Leave answers in trigonometric form.2 + 2i
A. 
cis 20°, 
cis 140°, 
cis 260°
B. 
cis 20°, 
cis 140°, 
cis 260°
C. 
cis 30°, 
cis 150°, 
cis 270°
D. 
cis 20°, 
cis 140°, 
cis 260°
Answer: D
Mathematics
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Find the length of the indicated portion of the trajectory.r(t) = (2 + 2t)i + (6 + 3t)j + (5 - 6t)k, -1 ? t ? 0
A. 5 B. 7 C. 8 D. 9
Mathematics
Simplify the difference quotients 
and 
for the following function. Rationalize the numerator when necessary.f(x) = 9x + 2
A. 9; 9 B. 9h; 9a C. 9x - 9h; 9x - 9a D. 9; 9x - 9a
Mathematics
Find the volume of the solid generated by revolving the region about the y-axis.The region enclosed by x = 
, x = 0, y = - 3, y = 3
A. 
?
B. 
?
C. 
?
D. 6?
Mathematics
Evaluate the function.The graph of y = f(x) is shown below. Find f(7)
A. 7 B. -2 C. 5 D. -5
Mathematics