Write the complex number in rectangular form.9(cos ? + i sin ?)
A. 9
B. 9i
C. -9
D. -9i
Answer: C
Mathematics
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For the function, find the average rate of change of f from 1 to x: 
f(x) = x2 - 2x
A. x - 1
B. 1
C. x + 1
D. 
Mathematics
Convert 
to degrees Fahrenheit.
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Simplify the following by combining like terms.-6r - 11r2 - 3r2 - 5r
A. -25r B. -25r2 C. -11r - 14r2 D. cannot be simplified
Mathematics
In the 
circuit problem in the text, C stands for
Select the correct answer.
?
A. capacitance B. resistance C. current D. inductance E. charge on the capacitor
Mathematics