Calculus > SOPHIA Milestone > Sophia College Algebra Units - Milestones 1, 2, 3, 4, 5 & Final Combined (All)

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Sophia College Algebra Units - Milestones 1, 2, 3, 4, 5 & Final Combined

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College Algebra Unit 4 - Milestone 4 with answers!! 18 questions were answered correctly. 2 questions were answered incorrectly. 1 Angela is an electrical engineer who is testing the voltage of a ... circuit given a certain current and resistance. She uses the following formula to calculate voltage: The circuit she tests has a current of amps and a resistance of ohms. What is the voltage of the circuit? • volts • volts. correct • volts • volts RATIONALE The voltage of the circuit is the product of the current and resistance. Recall that we can write as and as . and can combine to . Now we can simplify the last term, , which contains the imaginary unit squared. Recall that the is equivalent to , which can be substituted in our expression. The expression multiplies to Next, combine like terms. Once we have expressed voltage in terms of , we need to multiply these two complex numbers by using FOIL. Multiply the first terms , the outside terms , the inside terms , and the last terms . Next, evaluate each multiplication. [Show More]

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