Soap can be made from glycerol :D Hope this helps!
In the atmosphere, carbon is stored in the form of gases, such as carbon dioxide. ... This carbon can then be ingested and stored in animals that eat the plants. When the animals die, they decompose, and their remains become sediment, trapping the stored carbon in layers that eventually turn into rock or minerals.
So you do A^2 + b^2=C^2
(12X12)+(16X16)= 256+144=400 then fine the square root which is 20 so the answer is 20!
Hope I could help!