Find the radius circumference: 62.8

Write the expression 7x^3-28xy^2 as the product of 3 factors

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?

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?