Find all cube roots of the complex number. Leave answers in trigonometric form.125i
A. 5 cis 30°, 5 cis 150°, 5 cis 270°
B. 5 cis 60°, 5 cis 180°, 5 cis 300°
C. 1, -1, -i
D. 5 cis 0°, 5 cis 120°, 5 cis 240°
Answer: A
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Find the equation of the set of points P satisfying the given condition.The sum of the distances of P from (0, ±1) is 6.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Solve the equation.47x = 64
A. x = 
B. x = 
C. x = 64
D. x = 81
A laboratory technician records the life span (in months) of rats treated at birth with a fertility hormone. From the following frequency distribution, find the sample standard deviation of life span. Life span (months)Midpoint xFrequency fProduct xf-0.5 - 2.5 11 2.5 - 5.5 20 5.5 - 8.5 21 8.5 - 11.5 29 11.5 - 14.5 19 Please round your answer to the nearest whole number, if necessary.__________ months
Fill in the blank(s) with the appropriate word(s).
Evaluate or simplify the given expression.cos(2 cos-1 x)
A. 1 B. 2x2 - 1 C. 2x2 + 1 D. -1