You would do pi x r squared. r=12, and 12 squared is 144. pi (3.14) times 144 equals 452.16!
Answer:
Two or more linear equations in the same variables; also called a linear system. ... A linear system with infinitely many solutions. System of Linear Inequalities. Consists of two or more linear inequalities in the same variable.
Here is my answer, hope to help you
The answer is C, as it is rounded to 2 decimal places / 3 significant figures, which is more than the others.