Use De Moivre's theorem to simplify the expression. Write the answer in a + bi form.(-5
+ 5i
)3
A. 500
+ 500i
B. 15
+ 15i
C. 50
+ 50i
D. 5
+ 5i
Answer: A
Mathematics
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Write the number in scientific notation.58.7
A. 5.87 × 10-1 B. 5.87 × 102 C. 5.87 × 10-2 D. 5.87 × 101
Mathematics
Solve the problem.Find all points having a y-coordinate of 7 whose distance from the point (3, 4) is 
.
A. (6, 7) and (5, 7) B. (1, 7) and (13, 7) C. (-6, 7) and (5, 7) D. (1, 7) and (5, 7)
Mathematics
Use trigonometric identities to find the exact value.sin 130° cos 70° - cos 130° sin 70°
A. 
B. 
C. 
D. 
Mathematics
Find the component form of the specified vector.Let u = 
. Find -5u.
A. 
B. 
C. 
D. 
Mathematics