Spheres — Quiz Answers

The radius of a hemisphere is 6 inches. Which formula can be used to find the surface area of the hemisphere?

A company produces individually wrapped spherical biscuits. The minimum amount of wrapping material needed to cover a biscuit, assuming no edges overlap, is 200 point 9 6 square centimeters. What is the diameter of one biscuit? (Use 3 point 1 4 for the value of pi )

Mikita is painting a spherical model of a human cell for a science fair. She uses 452 point 1 6 square inches of paint to evenly cover the outside of the cell with one coat of paint. What is the diameter of the cell model? (Use 3 point 1 4 for the value of pi )

The radius of a sphere is 7 feet. Which formula can be used to find the surface area of the sphere?

The radius of a sphere is 8 centimeters. Which formula can be used to find the volume of the sphere?

The volume of a sphere is 81 pi cubic centimeters. Which equation can be used to solve for the radius of the sphere?

Mackenzie knows the surface area of a sphere. Which explains how she can find the surface area of a hemisphere with the same radius?

A company manufactures exercise balls. Type A is a spherical ball with a radius of 12 inches. Type B is a spherical ball with a radius of 16 inches. What is the ratio of the surface area of Type A to the surface area of Type B?

The volume of a sphere is 972 mathrm pi cubic millimeters. What is the circumference of the great circle of the sphere? (Recall that the formula for the volume for a sphere is cap v is equal to 4 thirds pi r cubed and the formula for the circumference of the great circle is cap c is equal to 2 pi r )

The drawing tip of a large marker is in the shape of a hemisphere. The diameter of the great circle of the hemisphere is 22 millimeters. What is the volume of the drawing tip? (Use 3 point 1 4 for pi Round the answer to the nearest tenth, if necessary. Recall that the formula for the volume of a sphere is cap v is equal to 4 thirds pi r cubed )