What is the length of the radius of a sphere with a diameter of 12 cm?(1 point)
cm
5 answers
The radius of a sphere is half of its diameter. Therefore, the length of the radius of a sphere with a diameter of 12 cm is 6 cm.
Find the surface area of a sphere with a diameter of 40 inches. Leave your answer in terms of pi.(1 point)
The surface area is
in.2
The surface area is
in.2
The formula for the surface area of a sphere is given by: A = 4πr^2.
Given the diameter of 40 inches, the radius (r) is half of the diameter, which is 20 inches.
Substituting the radius into the formula: A = 4π(20^2) = 4π(400) = 1600π.
Therefore, the surface area of the sphere is 1600π square inches.
Given the diameter of 40 inches, the radius (r) is half of the diameter, which is 20 inches.
Substituting the radius into the formula: A = 4π(20^2) = 4π(400) = 1600π.
Therefore, the surface area of the sphere is 1600π square inches.
Find the surface area of a sphere with a radius of 3.6 ft. Use 3.14 for pi. Round your answer to the nearest hundredth, if necessary.(1 point)
The surface area is
ft.2
The surface area is
ft.2
The formula for the surface area of a sphere is given by: A = 4πr^2.
Given the radius of 3.6 ft, we can substitute it into the formula: A = 4π(3.6^2).
Using the value of pi as 3.14: A = 4(3.14)(3.6^2) = 4(3.14)(12.96) = 162.3744.
Rounding this to the nearest hundredth, the surface area of the sphere is approximately 162.37 square feet.
Given the radius of 3.6 ft, we can substitute it into the formula: A = 4π(3.6^2).
Using the value of pi as 3.14: A = 4(3.14)(3.6^2) = 4(3.14)(12.96) = 162.3744.
Rounding this to the nearest hundredth, the surface area of the sphere is approximately 162.37 square feet.