Denominator:

so excluded values are x = -1 and x = 1.
Answer D.
I did some research, and I think it's the first one. PLEASE CORRECT ME IF I'M WRONG!!
Here's why, because the first segment extends from 0 to 1. So, x has to be 0 or larger, but less than 1 or 1.
Answer:
B. unit of account
Step-by-step explanation:
Accounts are kept in terms of units of account. Money serves as the unit of account when accounts are kept in terms of money.
-4^4= -4*-4*-4*-4
-4*-4=16
16*-4=-64
-64*-4= 256
Final answer: 256
Hexadecimal numerals are widely used by computer system designers and programmers, as they provide a human-friendly representation of binary-coded values. Each hexadecimal digit represents four binary digits, also known as a nibble, which is half a byte.