Cheryl is designing a triangular-shaped flower bed. She wants to place a potted plant equidistant from each side of the flower bed. Which point of concurrency would be most helpful Cheryl? I need help ASAP!!!

Acertain drug is made from only two ingredients: compound a and compound b. there are 3 millimeters of compound a used for every 4 millimeters of compound b. if a chemist wants to make 693 milliliters of the drug, how many milliliters of compound a are needed?