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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Calculate the arc length of the indicated portion of the curve r(t).r(t) = 
t3/2i + (5t sin t)j + (5t cos t)k ; -4 ? t ? 6
A. 150 B. 270 C. 140 D. 100
Factor completely.t3 + 729
A. (t + 9)(t2 + 81) B. (t - 9)(t2 + 9t + 81) C. (t - 729)(t2 - 1) D. (t + 9)(t2 - 9t + 81)
Name the property illustrated by the statement.6 ? 5 = 5 ? 6
A. Associative Property of Multiplication B. Identity Property of Multiplication C. Commutative Property of Multiplication D. Distributive Property
Solve the problem.A force acts on a certain object in such a way that when the object has moved a distance of r (in m), the force f (in newtons) is given by 
Find the work (in joules) done through the first four meters.
A. 218.7 J B. 64 J C. 176.7 J D. 40 J