Answer:
option B

Step-by-step explanation:
Given in the question a complex fraction
<h3>Step1</h3>
To divide complex numbers, you must multiply by the conjugate. To find the conjugate of a complex number all you have to do is change the sign between the two terms in the denominator.

<h3>Step2</h3>
Distribute (or FOIL) in both the numerator and denominator to remove the parenthesis.

<h3>Step3</h3>
Simplify the powers of i, specifically remember that i² = –1.

<h3>Step4</h3>

<h3>Step5</h3>
simply

Answer: The percent error is -2.1352% of Jocelyn's estimate.
X=75
y=75
z=105
as you do 42 + 63=105
I'm assuming that subtraction sign is mean to be an equals sign. If that is true than the answer is 403.75.