A store owner wants to estimate the average daily profit of that store. That person takes a sample of n=60 days to estimate but is not sure if the daily returns are normally distributed and therefore thinks the estimate is incorrect. Please comment on that.

Match each expression with its simplified form.

If chord ab is congruent to chord cd, then what must be true about ef and eg?

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?