Complex numbers are used in electronics to describe the current in an electric circuit. Ohm's law relates the current in a circuit, I, in amperes, the voltage of the circuit, E, in volts, and the resistance of the circuit, R, in ohms, by the formula 
Solve the problem using this formula.Find E, the voltage of a circuit, if I = (9 + 6i) amperes and R = (7 + 2i) ohms.
A. (60 - 51i) volts
B. (60 + 51i) volts
C. (51 - 60i) volts
D. (51 + 60i) volts
Answer: D
Mathematics
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and 18
A. 11
B. 22
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