Help please What quantity x maximizes revenue? What is the maximum revenue?

12 is 33 1/3% of 36 what is the whole

Avegetable garden and a surrounding path are shaped like a square together are 12 ft wide. the path is 1 feet wide. if one bag of gravel covers 8 square feet, how manu bags are needed to cover the path? round your answers to the nearest tenth.

What is the vertex form of f(x) = x2 + 6x + 3