Use the formula: Surface Area of Sphere = 4πr²
the surface area of a sphere is 7.84π ft.^2 what is the radius of this sphere
2.8 ft.
1.4 ft.
3.2 ft
4.4 ft
To find the radius of the sphere, we need to rearrange the formula:
Surface Area of Sphere = 4πr²
7.84π = 4πr²
Divide both sides of the equation by 4π:
7.84π / (4π) = r²
Simplify:
1.96 = r²
Take the square root of both sides:
√(1.96) = r
Simplify:
1.4 = r
Therefore, the radius of the sphere is 1.4 ft.