Answer:
For this case we have this function given:

In order to find the domain we need to find the possible values of x that the function can assume.
And we know that for this case the logarithm for 0 or neagtive numbers is not possible to calculate it, so then we can say that the domain for this case is:

And we can write this in formal notation as:
![D = [ X \in R | X>0]](https://tex.z-dn.net/?f=%20D%20%3D%20%5B%20X%20%5Cin%20R%20%7C%20X%3E0%5D)
And the best answer for this case would be:
all real numbers greater than 0
Step-by-step explanation:
For this case we have this function given:

In order to find the domain we need to find the possible values of x that the function can assume.
And we know that for this case the logarithm for 0 or neagtive numbers is not possible to calculate it, so then we can say that the domain for this case is:

And we can write this in formal notation as:
![D = [ X \in R | X>0]](https://tex.z-dn.net/?f=%20D%20%3D%20%5B%20X%20%5Cin%20R%20%7C%20X%3E0%5D)
And the best answer for this case would be:
all real numbers greater than 0
Answer:
The second one, I got that question
x ≤ 10
The answer to this question is 7,000
In this question, you are given a number(6,842) and asked to round it up into nearest thousand. Rounding up mean that when the number is 5 or more you will add one to the upper digit. In this case, the round up is to thousands so you need to look at the hundred digit which was 8. Since 8 is bigger than 5 then you can add 1 to the thousand into 7,000
(6/4) (2/3) times the denominators (4x3=12) then times (6x3 and 4x2) add the two answer together which should be 26/12 then reverse it. 12/26 = 6/13 (I'm English so might be different for you)