Use the formula: Surface Area of Sphere = 4πr ²the surface area of a sphere is 7.84πft² what is the radius of this sphere
2.8 ft.
1.4 ft.
3.2 ft
4.4 ft
The correct answer is 1.4 ft.
To find the radius, we set up the equation:
4πr² = 7.84π
Dividing both sides of the equation by 4π, we have:
r² = 1.96
Taking the square root of both sides, we have:
r = 1.4 ft.