Answer:
0.311,31%,0.3
Step-by-step explanation:
0.311 is the greatest
31% is second greatest
0.3 is smallest
Simple,
using the Pythagorean Theorem...

You have the hypotenuse (C) and one of the legs (A)
So, plug in what you know...

144+

=400
Now,isolate


-144 -144
Leaving you with...

So, now,

, to find what b is..
b=16
Thus, your answer.
25mm is the answer if its not tell me
Since you're adding x feet to the length which is 12 feet:
New area: (12+x)10.5