Solve.The inmedance Z in an alternating current circuit (like the one used in your home and in your classroom) is given by the formula Z = 
, where V is the voltage and I is the current. Find the value of Z if 
and 
A. -3 - 
i
B. 
+ 3i
C. 3 + 
i
D. - 
- 3i
Answer: C
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Write the expression as a single logarithm. Leave your answer in simplest form without negative or fractional exponents.
[log4(r - 1) - log4 q]
A. log4 
B. log4 
C. log4 
D. log4 
Solve the problem. Round your answer, if appropriate.The radius of a right circular cylinder is increasing at the rate of 
, while the height is decreasing at the rate of 
. At what rate is the volume of the cylinder changing when the radius is 6 in. and the height is 13 in.?
A. -102 in.3/sec B. 612? in.3/sec C. 144 in.3/sec D. 144? in.3/sec
Find the exact value of the expression if ? = 30°. Do not use a calculator.g(?) = cos ?Find g(2?).
A. 1
B. 
C. 
D. 
Use the power rules for exponents to simplify. Write the answer in exponential form.
2
A. 6t2 B. 12t2 C. 62t D. 62t2