Answer:
The answer is 3.
Step-by-step explanation:
C=dxpi
18x3.14=56.52
6x3.14=18.84
56.52/18.84=3
36
Easy math all you have to do is look at he problem
A is the answer
(5x - 2)²
25x² - 20 + 4
(5x - 2)(5x - 2)