What is the length of bc ? 9 units 11 units 15 units 16 units

Martha needs 22.25 strawberries for every 5 smoothies she makes. complete the table to see how many strawberries she would need to make 10 smoothies and 20 smoothies.

When turned about its axis of rotation, which shape could have created this three-dimensional object?

Ineed someone to me answer my question i have to have this done and knocked out