Question

Use the formula for the area of a circle to solve for the radius of the circle if the area is 78.5cm^2

Answer 1

`r=(√(314\pi))/(2\pi)`

Explanation:

`A=\pi r^2 \\ \\ 78.5=\pi r^2 \\ \\ r^2=(78.5)/(\pi) \\ \\ r=(√(314\pi))/(2\pi)`