"my master has no concern about his household with me in charge." This can be written in positive form. AT: "my master trusts me with his household" (See: [[rc://en/ta/man/translate/figs-doublenegatives]])
When something is "put under someone's care," it means that the person is responsible for its care and safe-keeping. AT: "he has put me in charge of everything that belongs to him" (See: [[rc://en/ta/man/translate/figs-metaphor]])
Here the author speaks of authority as if it were greatness. AT: "I have more authority in this house than anyone else" (See: [[rc://en/ta/man/translate/figs-metaphor]])
Joseph uses a question for emphasis. This can be written as a statement. AT: "I certainly cannot do such a wicked thing and sin against God." (See: [[rc://en/ta/man/translate/figs-rquestion]])