the formula for the area of a circle is A pi r^2 what is the radius of a circle with an area of 400 pi cm^2
![the formula for the area of a circle is A pi r2 what is the radius of a circle with an area of 400 pi cm2 class=](https://us-static.z-dn.net/files/d04/3880d8100a601412419e2a8a6bec1626.png)
Answer: 20 cm
Step-by-step explanation: Isolate the variable by dividing each side by factors that don't contain a variable.