Which of the following correctly describes a sphere? (1 point)
• A sphere has a face.
• A sphere has a center.
• A sphere has an edge.
• A sphere has a vertex.
A sphere has a center.
The diameter of a sphere passes through the center of the circle.
To find the surface area of a sphere, we use the formula: SA = 4πr^2, where r is the radius of the sphere.
Given that the diameter of the basketball is 9.2 inches, we can find the radius by dividing the diameter by 2:
radius = diameter / 2 = 9.2 / 2 = 4.6 inches
Now, we can substitute the radius into the formula and calculate the surface area:
SA = 4π(4.6)^2 = 4π(21.16) ≈ 265.77 in.
Therefore, the surface area of the basketball is approximately 265.77 square inches.
To find the surface area of a sphere, we use the formula: SA = 4πr^2, where r is the radius of the sphere.
Given that the diameter of the sphere is 30 inches, we can find the radius by dividing the diameter by 2:
radius = diameter / 2 = 30 / 2 = 15 inches
Now, we can substitute the radius into the formula and calculate the surface area:
SA = 4π(15)^2 = 4π(225) = 900π
Therefore, the surface area of the sphere is 900π square inches.
Which of the following is true about the diameter of a sphere? (1 point)
• The diameter of a sphere passes through the center of the circle.
• The diameter is not a chord.
• The diameter is 2.5 times the length of the radius.
• The diameter is the shortest length on a sphere.
Use the formula for the surface area of a sphere to find the surface area of a basketball that has a diameter of 9.2 inches. Use 3.14 pi and round your answer to the nearest hundredth, if necessary. (1 point)
• 66.44 in.?
• 265.77 in.
• 84.64 in.?
• 1, 063.08 in."
Find the surface area of a sphere with a diameter of 30 inches. Leave your answer in terms of pi. (1 point)
• 3, 600т in.?
• 2,8267 in.?
• 225л in.
2
O 900т in.?
Marcus is making spherical soaps to sell in his online store. The surface area of a soap is 63.585 in." and he wants to package them into a cube box so that it fits snugly. Using 3.14 as the value of pi, what should be the dimensions of the cube box? (1 point)
• 4 in. x 4 in. x 4 in.
• 4.5 in. × 4.5 in. × 4.5 in.
• 1.2 in. × 1.2 in. x 1.2 in.
• 2.25 in. x 2.25 in. × 2.25 in.