Answer:
I think these should help.
Step-by-step explanation:
Step 4 is wrong. the answer is 1/8, she changed sign on 2^(-3) to 2^(3) without moving it to numerator
D: (-infinity, 0) U (0, infinity) because you cant have a zero in the bottom of the fraction
The decimal of 2.1 is greater than 2.0 but less than 2.42