20
assume the exponential growth model a(t)=a subscript 0 e superscript kt and a world population of 6.7 billion in 2005. if the population must stay below 21billion during the next 100 years, what is the maximum acceptable annual rate of grow

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?