Answer:
A
Step-by-step explanation:
Definition of midpoint.
<K is midpoint for all, hence its reference.
Answer:
I believe the slope is m = 0.
(Let me know if you need the work)
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.
Answer:
132ft
Step-by-step explanation:
add all the sides
47+47+19+19=132