When Will I Ever Use This?

Gina works part time for Greenway Health Shop, a natural foods store. Dry goods, such as nuts and granola, can be purchased by the pound from the bulk canister aisle. Depending on the size of each shelf and demand for the product, different canisters are used. To find the capacity of the canisters, Gina must measure the height of different canisters and the radius of each canister and make a note of it.  Look at the three canisters below and answer the questions. Use the formula \( V = \pi r^2h \) to answer the following questions. (Remember that means radius squared.)