Use the formula to find the missing quantity for the given conditions. The formula E=IZ where E represents voltage, I represents current, and Z represents impedance (a measure of opposition to a sinusoidal electric current), is used in electrical engineering. The variable is a complex number.
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: A
Mathematics
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Determine the ratio and write it in lowest terms.27 people to 12 people
A. 
B. 
C. 
D. 
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Find the length of the third side of the right triangle. Give an exact answer and, where appropriate, an approximation to three decimal places.
A. c = 
cm; c ? 4.359 cm
B. c = 
cm; c = 110.5 cm
C. c = 221 cm
D. c = 
cm; c ? 14.866 cm
Mathematics
Solve.?x? ? 10
A. (-?, -10] B. (-?, -10] ? [10, ?) C. (-?, 10] D. [-10, 10]
Mathematics
Find the nth term {an} of the geometric sequence. When given, r is the common ratio.6, 3, 
, 
, ...
A. an = 
(6)n-1
B. an = 6 ? 2n-1
C. an = 6 
n-1
D. an = 6 
n-1
Mathematics