Grade 8 | Unit 5 | Lesson 19: Estimating a Hemisphere | Practice Problems

• Greater than

• Less than

• Equal to

A hemisphere fits snugly inside a cylinder with a radius of 6 cm. A cone fits snugly inside the same hemisphere. What is the volume of the cylinder? What is the volume of the cone? Estimate the volume of the hemisphere by calculating the average of the volumes of the cylinder and cone.

Find the hemisphere’s diameter if its radius is 6 cm.

Find the hemisphere’s diameter if its radius is 9.008 ft.

Find the hemisphere’s radius if its diameter is 6 cm.

Find the hemisphere’s radius if its diameter is 9.008 ft.

After almost running out of space on her phone, Elena checks with a couple of friends who have the same phone to see how many pictures they have on their phones and how much memory they take up. Could this information be reasonably modeled with a linear function? Explain your reasoning. Elena needs to delete photos to create 1,200 MB of space. Estimate the number of photos should she delete.