Step by step explanation
area= 2πrh
-> 2 * 3.14 * 2 * 9
-> 6.28 *18
-> 113.04
I made this graph for you- the red is the 80%, and the green is the leftover 20%.
The answer is D.
The others equal 90

Simply move -2 to another side.

Distribute -1/3 in (x+6)
---> Answer