# Chapter 1 - Section 1.3 - Exponents, Order of Operations, and Variable Expressions - Exercise Set: 20

$A=\pi(9^{2})$

#### Work Step by Step

If the area of a circle whose radius is 9 meters is $(9\cdot9\cdot\pi)$, we can write this area using exponential notation, noting that $9$ is multiplying itself twice. So the area can be expressed as: $A=\pi(9^{2})$

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