Sophia Milestone 4 College Algebra with correct answers.

Sophia Milestone 4 College Algebra with correct answers.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? • • • • RATIONALE The voltage of the circuit is the product of the current and resistance. Recall that we can write as and as . 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. The expression multiplies to Next, combine like terms. 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. .