We assume that the balloon has a shape of a sphere and its surface area is represented as:
A = 4πr²
We first need to determine the radius of the balloon. We are given the circumference which is calculated from the formula:
C = 2πr = 23
r = 3.66 cm
A = 4πr²
A = 4π(3.66)²
A = 168.39 cm²
