Answer: A = 4πr^2
Explanation:
The formula for calculating the radius of a sphere is
r = √A/4π
To solve for A, the first step is to square both sides of the equation. We have
r^2 = (√A/4π)^2
r^2 = A/4π
The next step is to cross multiply. It becomes
A = r^2 * 4π
A = 4πr^2
