Answer:
C. 
Step-by-step explanation:
1) First you cancel
because they are completely the same. then you take out the constants and simply.
2)You then have to use the Quotient Rule:

You should have ...

3) Simplify 6 − 3 to 3.

4) Simplify 5 − 4 to 1.
5) Use Rule of One: 
Answer is !!!

length : 
Explanation:
use the distance formula : 




Answer:
Radius - 25.4cm²
Circumstance- 159. 593cm²
Area - 2,026.83cm²
I think not sure
You need to divide 25.4 and 4 and you'll get 6.35