Step-by-step explanation:
Remember when expanding radicals,

When expanding radicals into two radicals, we don't let our radicand have two negative answers.


We don't do this



Answer:
please apply the formula of distance
l think but not sure
Answer:

Step-by-step explanation:
By definition, we can write ln instead of log. WHEN??
Whenever the base of the logarithm is the number "e".
Hence, when we have:

We can write it in shortcut as:

Hence, ln x can also be written as 
Fourth answer choice is right.