Write the complex number in polar form. Express the argument ? in degrees, with 0 ? ? ? 360°.9
+ 9i
A. 18( cos 300° + i sin 300°)
B. 18( cos 30° + i sin 30°)
C. 18( cos 330° + i sin 330°)
D. 18( cos 60° + i sin 60°)
Answer: B
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Use the distributive property to rewrite the algebraic expression without parentheses. Then simplify the result, if possible.3(8 - 5y)
A. 11 - 8y B. 24 - 5y C. 24 - 15y D. 39y
Tell whether the given rational expression is proper or improper. If improper, rewrite it as the sum of a polynomial and a proper rational expression.
A. improper; 
+ 
B. improper; 
C. proper
D. improper; 
- 
Differentiate.f(x) = 
A. f'(x) = 
B. f'(x) = 
C. f'(x) = 
D. f'(x) = 
An initial investment of $2000 grows at an annual interest rate of 4% compounded continuously. How long will it take to double the investment?
a. 17.33 years b. 18.33 years c. 18.00 years d. 17.00 years