As we know that any complex number written in the form ![a+ib](https://tex.z-dn.net/?f=%20a%2Bib%20)
can also be written as
in the complex plane.
Here the given complex number is ![-4i](https://tex.z-dn.net/?f=%20-4i%20)
which can be written as ![0-4i \ or \ (0,-4)](https://tex.z-dn.net/?f=%200-4i%20%20%5C%20or%20%5C%20%280%2C-4%29%20)
The polar representation is given as ![z=re^{i \theta}](https://tex.z-dn.net/?f=%20z%3Dre%5E%7Bi%20%5Ctheta%7D%20)
![r=\sqrt{4^2+0^2}=4\\ \\ \theta=tan^{-1 }\frac{-4}{0} =\infty\\ \\ \theta=\pi/2](https://tex.z-dn.net/?f=%20r%3D%5Csqrt%7B4%5E2%2B0%5E2%7D%3D4%5C%5C%20%5C%5C%20%5Ctheta%3Dtan%5E%7B-1%20%7D%5Cfrac%7B-4%7D%7B0%7D%20%3D%5Cinfty%5C%5C%20%5C%5C%20%5Ctheta%3D%5Cpi%2F2%20)
Hence the polar representation is
![z=4e^{i \frac{\pi }{2} }](https://tex.z-dn.net/?f=%20z%3D4e%5E%7Bi%20%5Cfrac%7B%5Cpi%20%7D%7B2%7D%20%7D%20)
Part A: 0.7(x)
Part B: 8.96/0.7 ---> (You can solve this by yourself)
For getting the answer, you can assume the regular price of the book is x. Then, the sale price would be x-0.3x, which is 0.7x
For part B, the price is 0.7 of the original. Dividing the number by 0.7 gets you the original price
Sorry I don’t now the answer to this problem
<h2>
Answer: (−∞,∞)</h2>
Step-by-step explanation:
Answer:
c.) 16in
Step-by-step explanation:
40/5 = 8
8 x 2 = 16