Sixty percent of the books at a library are non-fiction. the library has about 15000 books. how many of the library’s books are non-fiction? write a proportion to represent the situation

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?

Evaluate 5 + 6 · 2 – 8 ÷ 4 + 7 using the correct order of operations. a. 22 b. 11 c. 27 d. 5

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.