Which is the correct classification of StartRoot 18 EndRoot?

Find the equation using the point (4,8)

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?

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose