0.052301 km: 5 significant figures 400 cm: significant figures
50.0 m: 0.( significant figures
4,500.01 mi:
significant figures
what is it ?

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?