Find all the complex roots. Write the answer in the indicated form.The complex square roots of 144(cos 210° + i sin 210°) (polar form)
A. 12(cos 105° + i sin 105°), 195(cos 285° + i sin 285°)
B. 12(cos 105° + i sin 105°), 12(cos 285° + i sin 285°)
C. 12(cos 210° + i sin 210°), -12(cos 195° + i sin 195°)
D. 12(cos 210° + i sin 210°), 12(cos 195° + i sin 195°)
Answer: B
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Perform the indicated operation. Write the answer in the form a + bi.
A. 
B. 
+ 
i
C. - 
- 
i
D. - 
i
Write an equation for the line described. Give your answer in slope-intercept form.horizontal, through (3, -5)
A. x = 3 B. x = -5 C. y = 3 D. y = -5
Solve the problem.Assume that the elevation E, in feet, of a sag in a proposed route is given by 
where x represents the horizontal distance in feet along the proposed route and 0 ? x ? 5000. For what x-values is the elevation 1300 feet or more? Round your answer to the nearest foot.
A. x < 893 ft or x > 5959 ft B. x < 893 ft or x > 5969 ft C. x < 883 ft or x > 5959 ft D. x < 883 ft or x > 5969 ft
Determine if the given ordered triple is a solution of the system.(5, -5, -2)
A. not a solution B. solution