Exercises 89-94: Electricity Complex numbers are used in the study of electrical circuits. Impedance Z (or the opposi- tion to the flow of electricity), voltage V, and current I can all be represented by complex numbers. They are related by the equation Z = 4. Find the value of the missing variable. I = 8 + Si I = 8 + 6i 89. V = 50 + 98i 90. V = 30 + 60i 91. I = 1 + 2i Z = 3 – 4i 92. 1= } + Z = 8 - 9i 93. Z = 22 - 5i V = 27 + 17i 94. Z = 10 + 5i V = 10 + 8i

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