Write the complex number in trigonometric form r(cos ? + i sin ?), with ? in the interval [0°, 360°).8
+ 8i
A. 16(cos 300° + i sin 300°)
B. 16(cos 330° + i sin 330°)
C. 16(cos 30° + i sin 30°)
D. 16(cos 60° + i sin 60°)
Answer: C
Mathematics
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Solve the problem.The gravitational force (in lb) of attraction between two objects is given by 
where x is the distance between the objects. If the objects are 5 ft apart, find the work required to separate them until they are 50 ft apart. Express the result in terms of k.
A. 
k
B. 
k
C. 
k
D. 
k
Mathematics
Determine whether the proportion is true or false.
= 
A. True B. False
Mathematics
Solve the equation.5x3 - 2x2 - 5x + 2 = 0
A. -1, 
, 1
B. 
, 1
C. -1, 1
D. -1, - 
, 1
Mathematics
Solve the equation.
= 1 - 
A. 1, 5 B. 0, -5 C. 0, 7 D. ?
Mathematics