Three research departments have 7, 6, and 8 members, respectively. Each department is to select a delegate and an alternate to represent the department at a conference. In how many ways can this be done?

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).

What is the distance between point a and b

1. how do you convert the repeating, nonterminating decimal 0. to a fraction? explain the process as you solve the problem.