The approximation e superscript x baseline equals 1 plus x plus startfraction x squared over 2 endfraction is used when x is small. use the remainder estimation theorem to estimate the error when startabsolutevalue x endabsolutevalue less than two ninths .

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?