1. Find the surface area of a sphere with a radius of 8 cm. (1 point)
(0 pts) 267.9 cm2
(1 pt) 803.8 cm2
(0 pts) 2143.6 cm2
(0 pts) 201.0 cm2
The surface area of a sphere can be calculated using the formula:
Surface Area = 4πr^2
Where r is the radius of the sphere.
Substituting the given radius of 8 cm into the formula, we get:
Surface Area = 4π(8)^2
Surface Area = 4π(64)
Surface Area = 256π
Now, we can approximate the value of π as 3.14:
Surface Area ≈ 256(3.14)
Surface Area ≈ 803.84
Therefore, the surface area of the sphere with a radius of 8 cm is approximately 803.8 cm^2.
The correct answer is (1 pt) 803.8 cm^2.
To find the surface area of a sphere, you can use the formula:
Surface area = 4πr^2
where r is the radius of the sphere.
In this case, the radius of the sphere is given as 8 cm.
Now, substitute the value of the radius into the formula to find the surface area:
Surface area = 4π(8^2)
Surface area = 4π(64)
Surface area = 256π
Now, let's calculate the approximate value of the surface area using π (pi) as approximately 3.14:
Surface area ≈ 256 × 3.14
Surface area ≈ 803.84 cm^2
So, the correct answer is 803.8 cm^2.