Which of the points a(−4, 0, 1), b(3, 1, −5), and c(2, 4, 6) is closest to the yz-plane? why?

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expressions 4s +9s represents the total number of items that will be displayed on s shelves. simplify this expression

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

We just started the introduction into circles and i have no idea how to do this.