Describe the square roots of numbers using 2 sentences.
Write one sentence describing the square roots of
numbers such as 10.6, which is less than 1.
Write another sentence describing the square roots of
numbers such as 1.6 , which is greater than 1.

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?