Use De Moivre's theorem to simplify the expression. Write the answer in a + bi form.(-5
+ 5i
)3
A. 5
+ 5i
B. 500
+ 500i
C. 50
+ 50i
D. 15
+ 15i
Answer: B
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Rationalize the denominator of the expression. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Solve the problem.A woman borrowed $30,000 at 8% interest compounded annually. If the loan was paid off in one lump sum at the end of 6 years, how much did she pay?
A. $47,606.23 B. $17,606.23 C. $44,400.00 D. $32,400.00
Change to the measure indicated.10.30 meters to millimeters
A. 0.103 mm B. 1,030 mm C. 10,300 mm D. 0.0103 mm
Solve the problem.The monthly sales volume y (in thousands of dollars) is related to monthly advertising expenditures x (in thousands of dollars) according to the equation 
Spending how much money on advertising will result in sales of at least $50,000 per month?
A. Between $5000 and $10,000 B. At least $5000 C. At least $7500 D. At least $10,000