Answer:
Step-by-step explanation:
3.1x10 = 31, and 9x10=90, so the fraction is 31/90, whcih equals 3.44444444 . . .
Answer:
D
Step-by-step explanation:
when a number is added at the end it results in a vertical transformation
Answer:
2.20 per 1000 so it's gonna be $2.20/1000 per 1. So 4500 take $2.20/1000*4500=...
Step-by-step explanation:

Explanation
![9-\sqrt[]{-64}](https://tex.z-dn.net/?f=9-%5Csqrt%5B%5D%7B-64%7D)
Step 1
Let's remember that
A complex number is an object of the form

where a and b are real numbers and
![\begin{gathered} i^2=-1 \\ i=\sqrt[]{-1} \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20i%5E2%3D-1%20%5C%5C%20i%3D%5Csqrt%5B%5D%7B-1%7D%20%5Cend%7Bgathered%7D)
so
![\begin{gathered} 9-\sqrt[]{-64} \\ 9-\sqrt[]{-1\cdot64} \\ 9-\sqrt[]{-1}\sqrt[]{64} \\ 9-8\sqrt[]{-1} \\ 9-8i \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%209-%5Csqrt%5B%5D%7B-64%7D%20%5C%5C%209-%5Csqrt%5B%5D%7B-1%5Ccdot64%7D%20%5C%5C%209-%5Csqrt%5B%5D%7B-1%7D%5Csqrt%5B%5D%7B64%7D%20%5C%5C%209-8%5Csqrt%5B%5D%7B-1%7D%20%5C%5C%209-8i%20%5Cend%7Bgathered%7D)
therefore, the answer is

I hope this helps you