Find the surface area of a hemisphere with a radius 10m. Leave your answer in terms of pi.(1 point)
Responses
300π m2
300 pi m squared
200π m2
200 pi m squared
500π m2
500 pi m squared
400π m2
3 answers
400π m2
The surface area of a sphere is 7.84π ft.2 What is the radius of this sphere?(1 point)
ft
ft
To find the radius of a sphere given the surface area, we can use the formula for the surface area of a sphere:
Surface Area = 4πr^2
In this case, the surface area is given as 7.84π ft^2.
So, 7.84π = 4πr^2
Dividing both sides by 4π, we get:
r^2 = 7.84/4 = 1.96
Taking the square root of both sides, we get:
r = √(1.96) ≈ 1.4
Therefore, the radius of this sphere is approximately 1.4 ft.
Surface Area = 4πr^2
In this case, the surface area is given as 7.84π ft^2.
So, 7.84π = 4πr^2
Dividing both sides by 4π, we get:
r^2 = 7.84/4 = 1.96
Taking the square root of both sides, we get:
r = √(1.96) ≈ 1.4
Therefore, the radius of this sphere is approximately 1.4 ft.