Answer:
C = 18π cm
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Geometry
Circumference Formula: C = 2πr
Explanation:
Step 1: Define
Identify variables
r = 9 cm
Step 2: Find C
- Substitute in variables [Circumference Formula]: C = 2π(9 cm)
- Multiply: C = 18π cm