Find the phase shift.y = -5 cos(4x + ?)
A. 4? units to the right
B. 
units to the left
C. 5? units to the right
D. 
units to the left
Answer: B
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The table shows, for some particular year, a listing of several income levels and, for each level, the proportion of the population in the level and the probability that a person in that level bought a new car during the year. Given that one of the people who bought a new car during that year is randomly selected, find the probability that that person was in the indicated income category. Round your answer to the nearest hundredth. 
$5,000 - $9,999
A. 0.02 B. 0.01 C. 0.05 D. 0.03
Insert "?" or "?" in the blank to make the statement true.{2, 4, 6} {1, 2, 3, 4, 6}
A. ? B. ?
Solve the problem. Leave your answer in polar form.z = 10(cos 45° + i sin 45°)w = 5(cos 15° + i sin 15°)Find 
.
A. 2(cos 45° + i sin 45°)
B. 
(cos 30° + i sin 30°)
C. 2(cos 30° + i sin 30°)
D. 
(cos 45° + i sin 45°)
Find the quotient 
in standard form.
?
, 
?
A. 
B. ?
C. ?
D. ?
E. ?