You have 100 ft. of fencing to build a circular sheep pen. What is the area of the largest pen you build? (use 3.14 for Pi) (C = Pi * d) (A = Pi* m2)

What is not true about kl and mn? what is mn? (show )

What are the exclude value of mn+3m

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?