A cylinder has a base area of 3w^2+5 and a height of 4w find an expression for the volume

What is the percent of increase for a population that changed from 438,000 to 561,000

Can someone me and plz do the problem

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?